diff --git a/scripts/push-build.sh b/scripts/push-build.sh
index 380da8b..e4cadd0 100644
--- a/scripts/push-build.sh
+++ b/scripts/push-build.sh
@@ -37,6 +37,22 @@ if [ -f .env ]; then
   set -a; . ./.env; set +a
 fi
 
+# Git Bash 的 $HOME 常是 /home/<user>，而 Windows 上生成的密钥在 C:\Users\<user>\.ssh 下。
+# 这里自动兜底，避免在 Git Bash 里 ssh 找不到私钥而报 publickey denied。
+if [ -z "${SSH_KEY:-}" ]; then
+  # Windows 用户目录优先：Git Bash 的 $HOME 下可能还躺着一把无关的旧钥匙
+  for cand in "/c/Users/${USERNAME:-}/.ssh/id_ed25519" "${USERPROFILE:-}/.ssh/id_ed25519" "$HOME/.ssh/id_ed25519"; do
+    if [ -n "$cand" ] && [ -f "$cand" ]; then
+      SSH_KEY="$cand"
+      break
+    fi
+  done
+fi
+if [ -n "${SSH_KEY:-}" ]; then
+  SSH_OPTS="$SSH_OPTS -i $SSH_KEY"
+  echo "    使用私钥：$SSH_KEY"
+fi
+
 TUNNEL_PID=""
 cleanup() { [ -n "$TUNNEL_PID" ] && kill "$TUNNEL_PID" 2>/dev/null || true; }
 trap cleanup EXIT