In order to confirm the mooring safety of the Semi-Submersible Crane Vessel (SSCV) during typhoon season, the standard calculation is combined with software calculation, the influence of wind, wave and current is considered, and the interaction force between SSCV and dock as well as the force of other ships is calculated to check the mooring line strength and dock strength，which verifies that the SSCV could meet the mooring requirements for anti-typhoon, and provides experience and reference for the subsequent projects.