diff --git a/lib/test.sh b/lib/test.sh
index b38297f..26bc62b 100644
--- a/lib/test.sh
+++ b/lib/test.sh
@@ -499,6 +499,85 @@ test_notify_url_domain() {
     return 0
 }
 
+# ---------- 支付宝签名一致性校验 ----------
+
+# 防止密钥不同步导致的 invalid-signature（历史事故：服务器私钥与控制台应用公钥不匹配）
+test_payment_signature() {
+    log_info "校验支付宝支付签名与本地密钥一致性..."
+    if [ ! -f "${SCRIPT_DIR}/.env" ] || ! grep -q "ALIPAY_PRIVATE_KEY" "${SCRIPT_DIR}/.env"; then
+        log_warn "  本地 .env 无 ALIPAY_PRIVATE_KEY，跳过签名校验"
+        return 0
+    fi
+
+    local jwt
+    jwt=$(remote "curl -sk -X POST '${BASE_URL}/api/guest-login'" 2>/dev/null | python3 -c "import sys,json; print(json.load(sys.stdin).get('token',''))" 2>/dev/null)
+    if [ -z "$jwt" ]; then
+        log_error "获取 JWT 失败，无法校验支付签名"
+        return 1
+    fi
+
+    local form
+    form=$(remote "curl -sk --max-time 10 '${BASE_URL}/payment/page?package=monthly&jwt=${jwt}'" 2>/dev/null || true)
+    if ! echo "$form" | grep -q 'name="sign"'; then
+        log_warn "  支付表单未生成（可能为 Mock 支付模式），跳过签名校验"
+        return 0
+    fi
+
+    local result
+    result=$(echo "$form" | python3 -c "
+import base64, re, html, sys
+from cryptography.hazmat.primitives import serialization, hashes
+from cryptography.hazmat.primitives.asymmetric import padding
+
+priv_b64 = None
+for line in open('${SCRIPT_DIR}/.env'):
+    if line.startswith('ALIPAY_PRIVATE_KEY='):
+        priv_b64 = line.strip().split('=', 1)[1]
+        break
+if not priv_b64:
+    print('FAIL: 本地 .env 无 ALIPAY_PRIVATE_KEY')
+    sys.exit(1)
+
+try:
+    priv = serialization.load_der_private_key(base64.b64decode(priv_b64), password=None)
+except Exception:
+    try:
+        priv = serialization.load_pem_private_key(priv_b64.encode(), password=None)
+    except Exception as e:
+        print(f'FAIL: 私钥解析失败: {e}')
+        sys.exit(1)
+
+content = sys.stdin.read()
+fields = {}
+for m in re.finditer(r'name=\"([^\"]+)\" value=\"([^\"]*)\"', content):
+    fields[m.group(1)] = html.unescape(m.group(2))
+if 'sign' not in fields:
+    print('FAIL: 表单无 sign 字段')
+    sys.exit(1)
+sign = fields.pop('sign')
+sign_source = '&'.join(f'{k}={v}' for k, v in sorted(fields.items()))
+try:
+    our_sign = base64.b64encode(priv.sign(sign_source.encode('utf-8'), padding.PKCS1v15(), hashes.SHA256())).decode()
+except Exception as e:
+    print(f'FAIL: 签名失败: {e}')
+    sys.exit(1)
+
+if our_sign == sign:
+    print('PASS')
+else:
+    print('FAIL: 服务器签名与本地私钥不一致（密钥不同步！检查服务器 .env 与控制台应用公钥）')
+    sys.exit(1)
+" 2>/dev/null)
+
+    if [ "$result" = "PASS" ]; then
+        log_info "  服务器签名与本地私钥一致 ✅"
+        return 0
+    else
+        log_error "  ${result:-签名校验脚本执行失败}"
+        return 1
+    fi
+}
+
 # ---------- 主测试入口 ----------
 run_tests() {
     log_step "执行部署后测试..."
@@ -522,6 +601,7 @@ run_tests() {
         "test_payment_refund:退款+会员撤销"
         "test_payment_verify_detection:验证函数检测逻辑"
         "test_notify_url_domain:支付回调域名校验"
+        "test_payment_signature:支付签名一致性"
     )
     local i=1 total=${#tests[@]}
 
diff --git a/scripts/verify-alipay-keys.sh b/scripts/verify-alipay-keys.sh
new file mode 100755
index 0000000..cbdc371
--- /dev/null
+++ b/scripts/verify-alipay-keys.sh
@@ -0,0 +1,65 @@
+#!/bin/bash
+# ===========================================
+# 支付宝密钥一致性核对脚本
+# 对比本地 .env 与服务器 green/blue .env 的应用私钥，
+# 并从本地私钥导出应用公钥，供与支付宝控制台比对。
+# 防止 invalid-signature（密钥不同步）问题复发。
+# 用法: bash scripts/verify-alipay-keys.sh [--remote-host HOST]
+# ===========================================
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
+ENV_FILE="$PROJECT_ROOT/.env"
+REMOTE_HOST="${2:-aliyun-server}"
+
+RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; NC='\033[0m'
+info()  { echo -e "${GREEN}[INFO]${NC} $1"; }
+warn()  { echo -e "${YELLOW}[WARN]${NC} $1"; }
+error() { echo -e "${RED}[ERROR]${NC} $1" >&2; }
+
+if [ ! -f "$ENV_FILE" ] || ! grep -q '^ALIPAY_PRIVATE_KEY=' "$ENV_FILE"; then
+    error "本地 ${ENV_FILE} 未找到 ALIPAY_PRIVATE_KEY"
+    exit 1
+fi
+
+LOCAL_KEY=$(grep '^ALIPAY_PRIVATE_KEY=' "$ENV_FILE" | head -1 | cut -d'=' -f2- | tr -d '\r\n ')
+LOCAL_MD5=$(printf '%s' "$LOCAL_KEY" | md5sum | cut -d' ' -f1)
+info "本地 .env 私钥 MD5: ${LOCAL_MD5}"
+
+ALL_MATCH=true
+for ENV in green blue; do
+    REMOTE_MD5=$(ssh "$REMOTE_HOST" "grep '^ALIPAY_PRIVATE_KEY=' /root/rust/rust_backend_${ENV}/.env | cut -c20- | tr -d '\n' | md5sum | cut -d' ' -f1" 2>/dev/null || echo "N/A")
+    if [ "$REMOTE_MD5" = "$LOCAL_MD5" ]; then
+        info "服务器 ${ENV} 私钥一致 ✅"
+    else
+        warn "服务器 ${ENV} 私钥不一致（本地=${LOCAL_MD5} 远端=${REMOTE_MD5}）"
+        ALL_MATCH=false
+    fi
+done
+
+if [ "$ALL_MATCH" = true ]; then
+    info "本地与服务器密钥一致"
+else
+    warn "存在不一致！请检查服务器 .env 或重新部署"
+fi
+
+echo ""
+echo "========== 应用公钥（与控制台比对） =========="
+python3 -c "
+import base64
+from cryptography.hazmat.primitives import serialization
+key_b64 = '$LOCAL_KEY'
+try:
+    priv = serialization.load_der_private_key(base64.b64decode(key_b64), password=None)
+except Exception:
+    priv = serialization.load_pem_private_key(key_b64.encode(), password=None)
+pub_der = priv.public_key().public_bytes(
+    encoding=serialization.Encoding.DER,
+    format=serialization.PublicFormat.SubjectPublicKeyInfo
+)
+print(base64.b64encode(pub_der).decode())
+"
+echo ""
+info "请到支付宝开放平台 → 密钥工具 → 查看应用公钥，与上方公钥比对"
diff --git a/src/handlers/payment.rs b/src/handlers/payment.rs
index 1153ddf..7f171b9 100644
--- a/src/handlers/payment.rs
+++ b/src/handlers/payment.rs
@@ -1027,7 +1027,7 @@ pub async fn alipay_notify(
         .join("&");
 
     if let Err(e) = rsa2_verify(&sign_source, &sign, &config.alipay_public_key) {
-        tracing::warn!("支付宝签名验证失败: {}", e);
+        tracing::error!("支付宝回调签名验证失败: {}", e);
         return HttpResponse::Ok().body("fail");
     }
 
@@ -1213,7 +1213,7 @@ pub async fn alipay_refund_notify(
         .join("&");
 
     if let Err(e) = rsa2_verify(&sign_source, &sign, &config.alipay_public_key) {
-        tracing::warn!("支付宝退款签名验证失败: {}", e);
+        tracing::error!("支付宝退款回调签名验证失败: {}", e);
         return HttpResponse::Ok().body("fail");
     }