The invention discloses a recoverable ejector rod mechanism comprising an ejector rod, a protective cap, steel balls, a coil spring, stop screws, a spring and a cover body. The safety position is limited by a safety mechanism through the ejector rod limited by the steel balls, and the steel balls are limited and released through moving the protective cap up and down. The restoring force of the protective cap is provided by the coil spring, and the protective cap is limited to move within the allowable range by the stop screws; the acting force of the ejector rod for arming is enhanced through the spring, and the cover body is a fixed platform for the whole safety mechanism. The ejector rod safety mechanism disclosed by the invention is applied to external manual arming and a safety structure related to other structures, and has the advantages of small volume, high reliability and easy operation.