diff --git a/packages/components/form/Form.tsx b/packages/components/form/Form.tsx
index cab405e661..a8c8bbf477 100644
--- a/packages/components/form/Form.tsx
+++ b/packages/components/form/Form.tsx
@@ -54,7 +54,7 @@ const Form = forwardRefWithStatics(
     const formRef = useRef<HTMLFormElement>(null);
     const formMapRef = useRef(new Map()); // 收集所有包含 name 属性 formItem 实例
     const floatingFormDataRef = useRef({}); // 储存游离值的 formData
-    const formInstance = useInstance(props, formRef, formMapRef, floatingFormDataRef);
+    const formInstance = useInstance(props, formRef, formMapRef, floatingFormDataRef, form);
 
     useImperativeHandle(ref, () => formInstance);
     Object.assign(form, { ...formInstance });
@@ -71,6 +71,7 @@ const Form = forwardRefWithStatics(
       });
       form?.getInternalHooks?.(HOOK_MARK)?.notifyWatch?.([]);
       form.store = {};
+      floatingFormDataRef.current = {};
       onReset?.({ e });
     }
 
diff --git a/packages/components/form/hooks/interface.ts b/packages/components/form/hooks/interface.ts
index a14ce12407..14a98e8708 100644
--- a/packages/components/form/hooks/interface.ts
+++ b/packages/components/form/hooks/interface.ts
@@ -1,4 +1,4 @@
-import type { NamePath, FormInstanceFunctions } from '../type';
+import type { FormInstanceFunctions, NamePath } from '../type';
 
 export type Store = Record<string, any>;
 
@@ -13,6 +13,9 @@ export interface InternalHooks {
   setForm: (form) => void;
 }
 
+/**
+ * @internal
+ */
 export interface InternalFormInstance extends FormInstanceFunctions {
   _init?: boolean;
   store?: Store;
diff --git a/packages/components/form/hooks/useForm.ts b/packages/components/form/hooks/useForm.ts
index e532691526..e12a7a7838 100644
--- a/packages/components/form/hooks/useForm.ts
+++ b/packages/components/form/hooks/useForm.ts
@@ -1,6 +1,6 @@
 import { useState, useRef } from 'react';
 import log from '@tdesign/common-js/log/index';
-import type { NamePath } from '../type';
+import type { FormInstanceFunctions, NamePath } from '../type';
 import type { WatchCallBack, InternalHooks, InternalFormInstance, Store } from './interface';
 
 export const HOOK_MARK = 'TD_FORM_INTERNAL_HOOKS';
@@ -102,7 +102,7 @@ class FormStore {
   };
 }
 
-export default function useForm(form?: InternalFormInstance) {
+export default function useForm(form?: FormInstanceFunctions) {
   const formRef = useRef<InternalFormInstance>(Object.create({}));
   const [, forceUpdate] = useState({});
 
diff --git a/packages/components/form/hooks/useInstance.tsx b/packages/components/form/hooks/useInstance.tsx
index 335c13c707..5c44d19e43 100644
--- a/packages/components/form/hooks/useInstance.tsx
+++ b/packages/components/form/hooks/useInstance.tsx
@@ -12,6 +12,7 @@ import type {
   NamePath,
   TdFormProps,
 } from '../type';
+import type { InternalFormInstance } from './interface';
 
 // 检测是否需要校验 默认全量校验
 function needValidate(name: NamePath, fields: string[]) {
@@ -44,7 +45,8 @@ export default function useInstance(
   props: TdFormProps,
   formRef: React.RefObject<HTMLFormElement>,
   formMapRef: React.MutableRefObject<Map<any, any>>,
-  floatingFormDataRef: React.RefObject<Record<any, any>>,
+  floatingFormDataRef: React.MutableRefObject<Record<any, any>>,
+  form: InternalFormInstance,
 ) {
   const { classPrefix } = useConfig();
 
@@ -111,7 +113,10 @@ export default function useInstance(
   function getFieldValue(name: NamePath) {
     if (!name) return null;
     const formItemRef = findFormItem(name, formMapRef);
-    return formItemRef?.current?.getValue?.();
+    if (formItemRef?.current) {
+      return formItemRef.current.getValue?.();
+    }
+    return get(floatingFormDataRef.current, name);
   }
 
   // 对外方法，获取一组字段名对应的值，当调用 getFieldsValue(true) 时返回所有值
@@ -133,6 +138,8 @@ export default function useInstance(
         const [name, formItemRef] = entries[i];
         processField(name, formItemRef);
       }
+      // 即使没有对应的 FormItem 渲染，也返回数据，用于支持动态 set 的场景
+      merge(fieldsValue, cloneDeep(floatingFormDataRef.current));
     } else {
       if (!Array.isArray(nameList)) {
         log.error('Form', 'The parameter of "getFieldsValue" must be an array');
@@ -141,13 +148,21 @@ export default function useInstance(
       for (let i = 0; i < nameList.length; i++) {
         const name = nameList[i];
         const formItemRef = findFormItem(name, formMapRef);
-        processField(name, formItemRef);
+        if (formItemRef?.current) {
+          processField(name, formItemRef);
+        } else {
+          const floatingValue = get(floatingFormDataRef.current, name);
+          const fieldValue = calcFieldValue(name, floatingValue, !props.supportNumberKey);
+          merge(fieldsValue, fieldValue);
+        }
       }
     }
     return cloneDeep(fieldsValue);
   }
 
-  // 对外方法，设置对应 formItem 的值
+  /**
+   * 对外方法，设置对应 FormItem 的值
+   */
   function setFieldsValue(fields = {}) {
     const nameLists = objectToArray(fields);
     nameLists.forEach((nameList) => {
@@ -157,11 +172,15 @@ export default function useInstance(
         formItemRef.current.setValue?.(fieldValue);
       } else {
         set(floatingFormDataRef.current, nameList, fieldValue);
+        // 确保 store 始终包含所有被 set 的字段
+        set(form?.store, nameList, fieldValue);
       }
     });
   }
 
-  // 对外方法，设置对应 formItem 的数据
+  /**
+   * 对外方法，设置对应 FormItem 的状态
+   */
   function setFields(fields = []) {
     if (!Array.isArray(fields)) throw new TypeError('The parameter of "setFields" must be an array');