diff --git a/start.sh b/start.sh
index 99d1638..e1ddf26 100755
--- a/start.sh
+++ b/start.sh
@@ -1,6 +1,9 @@
 #!/usr/bin/env bash
 # exchange-monitor 启动脚本
 # 自动检测端口占用并清理旧进程
+# 用法: ./start.sh [--clean] [--rebuild]
+#   --clean   删除数据库后重新启动（数据库重置）
+#   --rebuild 强制重编译（即使源码无变更）
 
 set -e
 
@@ -8,33 +11,68 @@ cd "$(dirname "$0")"
 PORT=8888
 BIN="./exchange-monitor"
 LOG="exchange-monitor.log"
+GO_CMD="/home/jack/.local/go/bin/go"
 
-# 检查端口占用，释放旧进程
-PID=$(ss -tlnp 2>/dev/null | grep ":$PORT " | sed -n 's/.*pid=\([0-9]*\).*/\1/p')
-if [ -n "$PID" ]; then
-    echo "[start] Port $PORT 被 PID=$PID 占用，尝试优雅停止..."
-    kill "$PID" 2>/dev/null || true
+# 解析参数
+CLEAN_DB=false
+FORCE_REBUILD=false
+for arg in "$@"; do
+    case "$arg" in
+        --clean) CLEAN_DB=true ;;
+        --rebuild) FORCE_REBUILD=true ;;
+    esac
+done
+
+# 清理旧进程（通过进程名而非端口，更可靠）
+OLD_PIDS=$(pgrep -f exchange-monitor 2>/dev/null || true)
+if [ -n "$OLD_PIDS" ]; then
+    echo "[start] 停止旧进程 PID=$OLD_PIDS..."
+    kill $OLD_PIDS 2>/dev/null || true
     sleep 1
     # 强制清理
-    if kill -0 "$PID" 2>/dev/null; then
-        echo "[start] 强制终止 PID=$PID..."
-        kill -9 "$PID" 2>/dev/null || true
+    STILL_RUNNING=$(pgrep -f exchange-monitor 2>/dev/null || true)
+    if [ -n "$STILL_RUNNING" ]; then
+        echo "[start] 强制终止..."
+        kill -9 $STILL_RUNNING 2>/dev/null || true
         sleep 1
     fi
 fi
 
+# 可选：删除数据库
+if [ "$CLEAN_DB" = true ]; then
+    DB_PATH="$HOME/Project/exchange-monitor-go/data/trades.db"
+    if [ -f "$DB_PATH" ]; then
+        echo "[start] 删除数据库: $DB_PATH"
+        rm -f "$DB_PATH"
+    else
+        echo "[start] 数据库不存在，跳过"
+    fi
+fi
+
+# 编译
+NEED_BUILD=false
+if [ ! -x "$BIN" ]; then
+    NEED_BUILD=true
+elif [ "$FORCE_REBUILD" = true ]; then
+    NEED_BUILD=true
+elif [ -n "$(find . -name '*.go' -newer "$BIN" 2>/dev/null | head -1)" ]; then
+    NEED_BUILD=true
+elif [ -n "$(find web/static -newer "$BIN" 2>/dev/null | head -1)" ]; then
+    NEED_BUILD=true
+fi
+
+if [ "$NEED_BUILD" = true ]; then
+    echo "[start] 编译新二进制..."
+    $GO_CMD build -o "$BIN" . 2>&1
+    echo "[start] 编译完成"
+fi
+
 # 确认端口空闲
 if ss -tlnp 2>/dev/null | grep -q ":$PORT "; then
     echo "[start] ERROR: 端口 $PORT 仍被占用，放弃启动"
     exit 1
 fi
 
-# 编译（如果源码或嵌入文件有变更）
-if [ ! -x "$BIN" ] || [ -n "$(find . -name '*.go' -newer "$BIN" 2>/dev/null | head -1)" ] || [ -n "$(find web/static -newer "$BIN" 2>/dev/null | head -1)" ]; then
-    echo "[start] 编译新二进制..."
-    go build -o "$BIN" . 2>&1
-fi
-
 # 启动
 echo "[start] 启动 exchange-monitor (端口 $PORT)..."
 nohup "$BIN" >> "$LOG" 2>&1 &