High-sealing-performance pressure valve

The utility model relates to the technical field of pressure valves, in particular to a high-sealing-performance pressure valve which facilitates automatic pressure relief, improves stability of liquid outlet flow, reduces blockage of impurities in liquid and improves filtering and protecting effects. Comprising a shell, a ball and a handle, the ball is rotatably mounted in the shell, a through hole is formed in the middle of the ball, the handle is rotatably mounted at the top of the shell, and the bottom end of the handle is connected with the top end of the ball; the device further comprises a fixing device, a pressure relief device, a first barrel and a filter screen, the first barrel is arranged at the right end of the shell in a communicating mode through the fixing device, the fixing device is used for mounting or dismounting the first barrel, the filter screen is mounted in the first barrel, and the pressure relief device is arranged on the right portion of the shell in a communicating mode and used f