In order to further improve the implementation effectiveness and safety of the underwater weaponry test,aiming at the several problems emerged in the process of salvaging bottom mine in the past sea trials,this paper designs a salvage and recovery auxiliary system on the basis of reviewing and analyzing actual cases,and the system consists of cranes,winches,winch controller,tension detection system,automatic buffer system,bracket,steel cable and overload alarm system. The usage methods on the sea and response projects of abnormal conditions are discussed.