The utility model discloses an including a tetragonal body box, the back of this box is open, and both sides set up a bleeder pipe, every respectively the upper end of bleeder pipe all is equipped with the closed ball valve of this bleeder pipe of control, the bleeder pipe intercommunication inside the box, the preceding leaking stoppage screw rod that is equipped with of box, this leaking stoppage screw front end cover are equipped with a nut, nut surface loop shape is fixed with four pull rods, rotates the pull rod, pull rod and nut whole along leaking stoppage the axial of the screw rod removes, the rear end of leaking stoppage screw rod articulates there is one grade of pole, shelves the pole with the leaking stoppage screw rod is perpendicular. The utility model provides a pressure release formula leaking stoppage case can be under less water pressure carry out the shutoff to the ships and light boats cut, convenient operation, and for prior art, labour saving and time saving more.