diff --git a/diagnose_cursor_speed.sh b/diagnose_cursor_speed.sh
new file mode 100755
index 00000000..78972b82
--- /dev/null
+++ b/diagnose_cursor_speed.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+
+echo "=========================================="
+echo "Cursor AI 速度诊断工具"
+echo "=========================================="
+echo ""
+
+echo "【1. 基本网络连接测试】"
+echo "----------------------------------------"
+echo -n "测试基本网络连通性 (ping 8.8.8.8): "
+ping -c 3 -W 2 8.8.8.8 > /dev/null 2>&1
+if [ $? -eq 0 ]; then
+    echo "✓ 正常"
+    ping -c 3 8.8.8.8 | tail -1
+else
+    echo "✗ 异常"
+fi
+echo ""
+
+echo "【2. DNS 解析速度测试】"
+echo "----------------------------------------"
+echo -n "Google DNS (8.8.8.8): "
+time nslookup google.com 8.8.8.8 > /dev/null 2>&1
+echo -n "Cloudflare DNS (1.1.1.1): "
+time nslookup google.com 1.1.1.1 > /dev/null 2>&1
+echo ""
+
+echo "【3. HTTPS 连接速度测试】"
+echo "----------------------------------------"
+echo "测试 Google:"
+curl -o /dev/null -s -w "  DNS解析: %{time_namelookup}s | 连接: %{time_connect}s | SSL握手: %{time_appconnect}s | 总时间: %{time_total}s\n" https://www.google.com
+
+echo "测试 OpenAI API:"
+curl -o /dev/null -s -w "  DNS解析: %{time_namelookup}s | 连接: %{time_connect}s | SSL握手: %{time_appconnect}s | 总时间: %{time_total}s\n" https://api.openai.com
+
+echo "测试 GitHub:"
+curl -o /dev/null -s -w "  DNS解析: %{time_namelookup}s | 连接: %{time_connect}s | SSL握手: %{time_appconnect}s | 总时间: %{time_total}s\n" https://github.com
+echo ""
+
+echo "【4. Cursor 相关域名测试】"
+echo "----------------------------------------"
+for domain in "cursor.sh" "www.cursor.sh" "api.cursor.sh" "app.cursor.sh"; do
+    echo -n "测试 $domain: "
+    if nslookup $domain > /dev/null 2>&1; then
+        echo "✓ 可解析"
+        curl -o /dev/null -s -w "  连接时间: %{time_total}s\n" "https://$domain" 2>&1 | head -1
+    else
+        echo "✗ 无法解析"
+    fi
+done
+echo ""
+
+echo "【5. 系统信息】"
+echo "----------------------------------------"
+echo "操作系统: $(uname -a)"
+echo "DNS 服务器: $(grep nameserver /etc/resolv.conf 2>/dev/null | head -1 || echo '无法获取')"
+echo "代理设置: $(env | grep -i proxy || echo '无')"
+echo ""
+
+echo "【6. 网络延迟统计】"
+echo "----------------------------------------"
+echo "测试多个目标服务器的延迟:"
+for host in "8.8.8.8" "1.1.1.1" "github.com" "api.openai.com"; do
+    echo -n "  $host: "
+    ping -c 3 -W 2 $host 2>/dev/null | tail -1 | awk -F'/' '{print "平均延迟: "$5"ms"}'
+done
+echo ""
+
+echo "=========================================="
+echo "诊断完成！"
+echo ""
+echo "【判断建议】"
+echo "1. 如果基本网络连接正常，但 Cursor 慢 → 可能是 Cursor 服务器负载问题"
+echo "2. 如果所有 HTTPS 连接都慢 → 可能是网络问题或代理设置问题"
+echo "3. 如果 DNS 解析慢 → 可能是 DNS 服务器问题"
+echo "=========================================="