diff --git a/pom.xml b/pom.xml
index 3108a575a..4ed093d52 100644
--- a/pom.xml
+++ b/pom.xml
@@ -37,7 +37,8 @@
         <java.version>1.8</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <junit.jupiter.version>5.13.4</junit.jupiter.version>
-        <beetl.version>3.19.2.RELEASE</beetl.version>
+		<mockito.version>4.11.0</mockito.version>
+		<beetl.version>3.19.2.RELEASE</beetl.version>
         <common-util.version>2.2.9</common-util.version>
         <qdox.version>2.0.3.5</qdox.version>
         <datafaker.version>1.9.0</datafaker.version>
@@ -61,6 +62,12 @@
             <version>${junit.jupiter.version}</version>
             <scope>test</scope>
         </dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-junit-jupiter</artifactId>
+			<version>${mockito.version}</version>
+			<scope>test</scope>
+		</dependency>
         <dependency>
             <groupId>com.ibeetl</groupId>
             <artifactId>beetl</artifactId>
diff --git a/src/main/java/com/ly/doc/utils/DocUtil.java b/src/main/java/com/ly/doc/utils/DocUtil.java
index 1945aab77..6ac6371f2 100644
--- a/src/main/java/com/ly/doc/utils/DocUtil.java
+++ b/src/main/java/com/ly/doc/utils/DocUtil.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018-2024 smart-doc
+ * Copyright (C) 2018-2025 smart-doc
  *
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
@@ -18,6 +18,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+
 package com.ly.doc.utils;
 
 import com.ly.doc.builder.WordDocBuilder;
@@ -745,12 +746,27 @@ private static Map<String, String> getCommentsByTag(List<DocletTag> paramTags, f
 			if (DocTags.PARAM.equals(tagName) || DocTags.EXTENSION.equals(tagName)) {
 				String pName = value;
 				String pValue = DocGlobalConstants.NO_COMMENTS_FOUND;
-				int idx = value.indexOf(" ");
-				// existed \n
-				if (idx > -1) {
-					pName = value.substring(0, idx);
-					pValue = value.substring(idx + 1);
+
+				// Fixed #1129
+				// Split the value by the first sequence of whitespace
+				// (space,newline,tab, etc.) only into two parts.
+				String[] parts = value.trim().split("\\s+", 2);
+				// Successfully split into parameter name and description
+				if (parts.length == 2) {
+					// Parameter name
+					pName = parts[0];
+					// Description, preserving internal newlines and formatting
+					pValue = parts[1];
 				}
+				// Only one part found, likely just the parameter name
+				// without a description, OR an empty/whitespace-only value after trim
+				else if (parts.length == 1) {
+					// Covers both "paramName" and "" cases
+					// pValue remains DocGlobalConstants.NO_COMMENTS_FOUND
+					// Set pName based on whether the single part is empty
+					pName = parts[0];
+				}
+
 				if ("|".equals(StringUtil.trim(pValue)) && StringUtil.isNotEmpty(className)) {
 					throw new RuntimeException(tagValErrorMsg);
 				}
diff --git a/src/test/java/com/ly/doc/util/DocUtilTest.java b/src/test/java/com/ly/doc/util/DocUtilTest.java
index f444faee0..28c81ec6e 100644
--- a/src/test/java/com/ly/doc/util/DocUtilTest.java
+++ b/src/test/java/com/ly/doc/util/DocUtilTest.java
@@ -1,21 +1,45 @@
 package com.ly.doc.util;
 
 import com.ly.doc.constants.DocGlobalConstants;
+import com.ly.doc.constants.DocLanguage;
+import com.ly.doc.constants.DocTags;
 import com.ly.doc.enums.IEnum;
 import com.ly.doc.enums.OrderEnum;
 import com.ly.doc.utils.DocUtil;
-import com.ly.doc.constants.DocLanguage;
+import com.thoughtworks.qdox.model.DocletTag;
 import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
 
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.when;
+
 /**
  * @author yu 2018/12/10.
  */
 public class DocUtilTest {
 
+	/**
+	 * Assuming DocTags.PARAM is "param"
+	 */
+	private static final String TAG_NAME_PARAM = DocTags.PARAM;
+
+	/**
+	 * Assuming DocTags.EXTENSION is "extension"
+	 */
+	private static final String TAG_NAME_EXTENSION = DocTags.EXTENSION;
+
+	/**
+	 * Assuming DocGlobalConstants.NO_COMMENTS_FOUND
+	 */
+	private static final String NO_COMMENTS_FOUND = DocGlobalConstants.NO_COMMENTS_FOUND;
+
 	@Test
 	public void test() {
 		System.setProperty(DocGlobalConstants.DOC_LANGUAGE, DocLanguage.CHINESE.getCode());
@@ -80,4 +104,127 @@ public void testReplaceGenericParameter() {
 		System.out.println(result); // Output: com.Test<List<Use
 	}
 
+	// Helper method to create a mock DocletTag
+	private DocletTag createMockTag(String value) {
+		DocletTag mockTag = Mockito.mock(DocletTag.class);
+		when(mockTag.getValue()).thenReturn(value);
+		return mockTag;
+	}
+
+	@Test
+	public void testGetCommentsByTag_ParamWithNewlines() {
+		// Scenario 1: Normal case - param name and description on same line
+		DocletTag tag1 = createMockTag("id user identifier");
+		// Scenario 2: Description starts on a new line with indentation
+		DocletTag tag2 = createMockTag("name\n            user's full name");
+		// Scenario 3: Description has multiple newlines and complex formatting
+		DocletTag tag3 = createMockTag(
+				"age   user's age in years\n            Default is 25.\n            NOTE: Must be > 0.");
+		// Scenario 4: Only parameter name, no description
+		DocletTag tag4 = createMockTag("flag");
+		// Scenario 5: Parameter name with leading/trailing whitespace in the raw value
+		// part that's not the name itself
+		DocletTag tag5 = createMockTag("  email  user's email address  ");
+		// Scenario 6: Description starts immediately after parameter name WITH A SPACE
+		// (Standard Javadoc format)
+		DocletTag tag6 = createMockTag("status Active user status flag");
+		// Scenario 7: Description contains leading whitespace after the parameter name
+		DocletTag tag7 = createMockTag("count  Number of items to retrieve");
+
+		List<DocletTag> tags = Arrays.asList(tag1, tag2, tag3, tag4, tag5, tag6, tag7);
+
+		Map<String, String> result = DocUtil.getCommentsByTag(tags, TAG_NAME_PARAM);
+
+		// Verify results
+		assertEquals("user identifier", result.get("id"), "Scenario 1: Description should be 'user identifier'");
+		assertEquals("user's full name", result.get("name"),
+				"Scenario 2: Description should be 'user's full name', preserving content after newline.");
+		assertEquals("user's age in years\n            Default is 25.\n            NOTE: Must be > 0.",
+				result.get("age"), "Scenario 3: Description should preserve newlines and formatting.");
+		assertEquals(NO_COMMENTS_FOUND, result.get("flag"), "Scenario 4: Should return NO_COMMENTS_FOUND for 'flag'");
+		assertEquals("user's email address", result.get("email"),
+				"Scenario 5: Name should be 'email', description should be 'user's email address'");
+		assertEquals("Active user status flag", result.get("status"),
+				"Scenario 6: Description should be 'Active user status flag'");
+		assertEquals("Number of items to retrieve", result.get("count"),
+				"Scenario 7: Description should be 'Number of items to retrieve'");
+
+	}
+
+	@Test
+	public void testGetCommentsByTag_ExtensionWithNewlines() {
+		// Similar scenarios for @extension
+		DocletTag tag1 = createMockTag("extId extension identifier");
+		DocletTag tag2 = createMockTag("extName\n            extension name");
+		DocletTag tag3 = createMockTag("extConfig   extension configuration details\n            with multiple lines.");
+		DocletTag tag4 = createMockTag("extFlag");
+
+		List<DocletTag> tags = Arrays.asList(tag1, tag2, tag3, tag4);
+
+		Map<String, String> result = DocUtil.getCommentsByTag(tags, TAG_NAME_EXTENSION);
+
+		// Verify results
+		assertEquals("extension identifier", result.get("extId"));
+		assertEquals("extension name", result.get("extName"));
+		assertEquals("extension configuration details\n            with multiple lines.", result.get("extConfig"));
+		assertEquals(NO_COMMENTS_FOUND, result.get("extFlag"));
+	}
+
+	@Test
+	public void testGetCommentsByTag_ParamWithCarriageReturn() {
+		// Scenario: Description has Windows-style CRLF (\r\n)
+		String valueWithCRLF = "token\r\n            Authentication token,\r\n            required for access.";
+		DocletTag tag = createMockTag(valueWithCRLF);
+
+		List<DocletTag> tags = Collections.singletonList(tag);
+		Map<String, String> result = DocUtil.getCommentsByTag(tags, TAG_NAME_PARAM);
+
+		assertEquals("Authentication token,\r\n            required for access.", result.get("token"),
+				"Should handle CRLF correctly, preserving the newline and content.");
+	}
+
+	@Test
+	public void testGetCommentsByTag_ParamOnlyName() {
+		// Scenario: Only parameter name exists, no space/description
+		DocletTag tag = createMockTag("justParamName");
+		List<DocletTag> tags = Collections.singletonList(tag);
+		Map<String, String> result = DocUtil.getCommentsByTag(tags, TAG_NAME_PARAM);
+
+		assertEquals(NO_COMMENTS_FOUND, result.get("justParamName"),
+				"Should return NO_COMMENTS_FOUND for 'justParamName'");
+	}
+
+	@Test
+	public void testGetCommentsByTag_ParamEmptyValue() {
+		// Scenario: Empty value string
+		DocletTag tag = createMockTag("");
+		List<DocletTag> tags = Collections.singletonList(tag);
+		Map<String, String> result = DocUtil.getCommentsByTag(tags, TAG_NAME_PARAM);
+
+		// An empty string after trim results in [""], so parts[0] is "", and parts.length
+		// is 1.
+		// The logic assigns pName = parts[0] (which is ""), and pValue remains the
+		// default NO_COMMENTS_FOUND.
+		// The map.put(pName.trim(), pValue) effectively does map.put("",
+		// NO_COMMENTS_FOUND).
+		assertEquals(NO_COMMENTS_FOUND, result.get(""), // 修正 NO_COMMENTS_FOUND 的值
+				"Should handle empty value, key should be empty string.");
+		assertTrue(result.containsKey(""), "Map should contain an entry with an empty string key.");
+	}
+
+	@Test
+	public void testGetCommentsByTag_ParamWhitespaceOnlyValue() {
+		// Scenario: Value is only whitespace
+		DocletTag tag = createMockTag("  \t \n  ");
+		List<DocletTag> tags = Collections.singletonList(tag);
+		Map<String, String> result = DocUtil.getCommentsByTag(tags, TAG_NAME_PARAM);
+
+		// Whitespace-only string after trim becomes "", same as empty value scenario.
+		// After trim and split, pName should be "" and pValue should be
+		// NO_COMMENTS_FOUND.
+		assertEquals(NO_COMMENTS_FOUND, result.get(""),
+				"Should handle whitespace-only value, key should be empty string.");
+		assertTrue(result.containsKey(""), "Map should contain an entry with an empty string key.");
+	}
+
 }