diff --git a/app/(tabs)/ask.tsx b/app/(tabs)/ask.tsx
index d157744..1c90adc 100644
--- a/app/(tabs)/ask.tsx
+++ b/app/(tabs)/ask.tsx
@@ -6,7 +6,7 @@ import { ThemedText } from "@/components/ThemedText";
 import { fetchApi } from "@/lib/server-api-util";
 import { Message } from "@/types/ask";
 import { router, useLocalSearchParams } from "expo-router";
-import React, { useEffect, useRef, useState } from 'react';
+import React, { useCallback, useEffect, useRef, useState } from 'react';
 import {
     Animated,
     Keyboard,
@@ -14,6 +14,7 @@ import {
     Platform,
     ScrollView,
     StyleSheet,
+    TextInput,
     TouchableOpacity,
     View
 } from 'react-native';
@@ -38,14 +39,56 @@ export default function AskScreen() {
         newSession: string;
     }>();
 
-    // 处理滚动到底部
-    useEffect(() => {
+    // 处理滚动到底部 - 优化版本
+    const scrollToBottom = useCallback((animated = true) => {
         if (scrollViewRef.current && !isHello) {
-            scrollViewRef.current.scrollToEnd({ animated: true });
+            // 使用更长的延迟确保内容渲染完成
+            setTimeout(() => {
+                scrollViewRef.current?.scrollToEnd({ animated });
+            }, 150);
         }
-    }, [userMessages, isHello]);
+    }, [isHello]);
 
-    // 处理路由参数
+    // 监听键盘显示/隐藏事件 - 增强版本
+    useEffect(() => {
+        const keyboardDidShowListener = Keyboard.addListener(
+            'keyboardDidShow',
+            (e) => {
+                // 键盘显示时滚动到底部
+                setTimeout(() => {
+                    scrollToBottom(true);
+                }, 100);
+            }
+        );
+
+        const keyboardDidHideListener = Keyboard.addListener(
+            'keyboardDidHide',
+            () => {
+                // 键盘隐藏时也滚动到底部（可选）
+                setTimeout(() => {
+                    scrollToBottom(false);
+                }, 100);
+            }
+        );
+
+        return () => {
+            keyboardDidShowListener.remove();
+            keyboardDidHideListener.remove();
+        };
+    }, [scrollToBottom]);
+
+    // 处理消息变化时滚动 - 优化版本
+    useEffect(() => {
+        if (!isHello && userMessages.length > 0) {
+            // 消息变化时立即滚动到底部
+            const timer = setTimeout(() => {
+                scrollToBottom(true);
+            }, 50);
+            return () => clearTimeout(timer);
+        }
+    }, [userMessages.length, isHello, scrollToBottom]);
+
+    // 处理路由参数 - 优化版本
     useEffect(() => {
         if (sessionId) {
             setConversationId(sessionId);
@@ -81,17 +124,56 @@ export default function AskScreen() {
             Animated.parallel([
                 Animated.timing(fadeAnim, {
                     toValue: 0,
-                    duration: 1000,
+                    duration: 300,
                     useNativeDriver: true,
                 }),
                 Animated.timing(fadeAnimChat, {
                     toValue: 1,
-                    duration: 1000,
+                    duration: 300,
                     useNativeDriver: true,
                 })
-            ]).start();
+            ]).start(() => {
+                // 动画完成后滚动到底部
+                setTimeout(() => {
+                    scrollToBottom(false);
+                }, 50);
+            });
         }
-    }, [isHello, fadeAnim, fadeAnimChat]);
+    }, [isHello, fadeAnim, fadeAnimChat, scrollToBottom]);
+
+    // 页面进入时的处理 - 新增
+    useEffect(() => {
+        if (!isHello) {
+            // 页面完全加载后滚动到底部
+            const timer = setTimeout(() => {
+                scrollToBottom(false);
+            }, 300);
+            return () => clearTimeout(timer);
+        }
+    }, [isHello, scrollToBottom]);
+
+    // 新增：页面获得焦点时处理
+    useEffect(() => {
+        // 页面进入时确保键盘关闭并滚动到底部
+        const timer = setTimeout(() => {
+            if (!isHello) {
+                // 让所有输入框失去焦点
+                try {
+                    if (TextInput.State?.currentlyFocusedInput) {
+                        const input = TextInput.State.currentlyFocusedInput();
+                        if (input) input.blur();
+                    }
+                } catch (error) {
+                    console.log('失去焦点失败:', error);
+                }
+
+                // 滚动到底部
+                scrollToBottom(false);
+            }
+        }, 200);
+
+        return () => clearTimeout(timer);
+    }, [isHello, scrollToBottom]);
 
     return (
         <View style={[styles.container, { paddingTop: insets.top }]}>
@@ -100,8 +182,17 @@ export default function AskScreen() {
                 <TouchableOpacity
                     style={styles.backButton}
                     onPress={() => {
-                        router.push('/memo-list')
+                        // 确保关闭键盘
+                        try {
+                            if (TextInput.State?.currentlyFocusedInput) {
+                                const input = TextInput.State.currentlyFocusedInput();
+                                if (input) input.blur();
+                            }
+                        } catch (error) {
+                            console.log('失去焦点失败:', error);
+                        }
                         Keyboard.dismiss();
+                        router.push('/memo-list');
                     }}
                 >
                     <ReturnArrow />
@@ -113,7 +204,6 @@ export default function AskScreen() {
             <KeyboardAvoidingView
                 style={styles.keyboardAvoidingView}
                 behavior={Platform.OS === "ios" ? "padding" : "height"}
-                keyboardVerticalOffset={Platform.OS === "ios" ? 0 : 0}
                 enabled={!isHello}
             >
                 <View style={styles.contentContainer}>
@@ -138,13 +228,27 @@ export default function AskScreen() {
                             styles.absoluteView,
                             {
                                 opacity: fadeAnimChat,
-                                // 使用 pointerEvents 控制交互
                                 pointerEvents: isHello ? 'none' : 'auto',
                                 zIndex: 0
                             }
                         ]}
                     >
-                        <Chat userMessages={userMessages} sessionId={sessionId} setSelectedImages={setSelectedImages} selectedImages={selectedImages} />
+                        <ScrollView
+                            ref={scrollViewRef}
+                            style={styles.chatContainer}
+                            contentContainerStyle={styles.chatContentContainer}
+                            keyboardDismissMode="interactive"
+                            keyboardShouldPersistTaps="handled"
+                            showsVerticalScrollIndicator={false}
+                            onContentSizeChange={() => scrollToBottom(true)}
+                        >
+                            <Chat
+                                userMessages={userMessages}
+                                sessionId={sessionId}
+                                setSelectedImages={setSelectedImages}
+                                selectedImages={selectedImages}
+                            />
+                        </ScrollView>
                     </Animated.View>
                 </View>
 
@@ -210,16 +314,21 @@ const styles = StyleSheet.create({
     contentContainer: {
         flex: 1,
         justifyContent: 'center',
-        paddingBottom: 20,
     },
     absoluteView: {
-        position: 'absolute',  // 保持绝对定位
+        position: 'absolute',
         top: 0,
         left: 0,
         right: 0,
         bottom: 0,
         backgroundColor: 'white',
     },
+    chatContainer: {
+        flex: 1,
+    },
+    chatContentContainer: {
+        paddingBottom: 20,
+    },
     inputContainer: {
         padding: 16,
         paddingBottom: 24,