diff --git a/.woodpecker/my-first-workflow.yaml b/.woodpecker/my-first-workflow.yaml
index 2a4df924..4ba7e25e 100644
--- a/.woodpecker/my-first-workflow.yaml
+++ b/.woodpecker/my-first-workflow.yaml
@@ -30,8 +30,25 @@ steps:
       - mkdir -p /root/.ssh && chmod 700 /root/.ssh
       # 写入并清理SSH密钥（兼容RSA/ED25519，保留原始换行）
   # 替换原echo "$WOODPECKER_SSH_KEY"那行，其余ssh配置不变
-      - echo "$WOODPECKER_SSH_KEY" > /root/.ssh/id_ed25519 && chmod 600 /root/.ssh/id_ed25519
-
+      # ========== 关键修改：SSH密钥写入逻辑（核心修复） ==========
+      # 替换原echo命令，用cat+EOF保留密钥原始换行，避免格式损坏
+      - |
+        if [ -n "$WOODPECKER_SSH_KEY" ]; then
+          # 写入ED25519密钥（保留原始格式，单引号EOF避免转义）
+          cat > /root/.ssh/id_ed25519 << 'EOF'
+        $WOODPECKER_SSH_KEY
+        EOF
+          chmod 600 /root/.ssh/id_ed25519
+          echo "✅ ED25519密钥写入完成"
+        # 可选：兼容RSA密钥（如果ED25519解析失败，启用下方逻辑）
+        # elif [ -n "$WOODPECKER_SSH_KEY_RSA" ]; then
+        #   cat > /root/.ssh/id_rsa << 'EOF'
+        # $WOODPECKER_SSH_KEY_RSA
+        # EOF
+        #   chmod 600 /root/.ssh/id_rsa
+        #   echo "✅ RSA密钥写入完成"
+        # fi
+      
       - chmod 600 /root/.ssh/id_ed25519
       # 添加GitHub主机密钥（完整覆盖，避免重复）
       - ssh-keyscan -H github.com > /root/.ssh/known_hosts