Hydraulic pump casting with good sealing performance

The hydraulic pump casting with the good sealing performance comprises a hydraulic pump casting body, a connecting mechanism is arranged in the lower end of the hydraulic pump casting body, an installation mechanism is fixedly connected to the lower end of the hydraulic pump casting body, and a sealing mechanism is slidably connected to the interior of the installation mechanism. The outer part of the sealing mechanism is fixedly connected with a limiting mechanism; by arranging the four sliding grooves, the four sliding rods can conveniently slide in the sliding grooves, so that the two transverse plates can be synchronously driven to move in the moving opening, the position of the sealing block is conveniently adjusted, the sealing block drives the sealing ring to move into the penetrating opening for sealing at the same time, and the sealing performance is improved; and meanwhile, the transverse plate can drive the fixing plate to move when moving, so that the sealing ring is limited through a threaded hol