The invention discloses a plunger valve with a good plug protecting effect. The plunger valve comprises flange connecting discs, sealing pads, filtering brackets, a valve shell, sliding pipes, threaded connecting blocks, a sealing circle, a screw, rotating discs, balls, sealing rings, inlet and outlet holes, hooks, connecting pieces, a plug, a buffering pipe, a buffering block, a spring, metal pieces, and reset springs. A cavity body is formed in an inner cavity of the plug. The reset springs are fixedly connected into the inner cavity of the plug, and the metal pieces are fixedly connected tothe ends of the reset springs. The metal pieces are erected on the lateral surfaces of the inner cavity of the plug. Compared with a plug with a conventional fixing structure, the elastic deformationrange of the edge is wider, and abrasion of the plug is reduced. In the case of abrasion of the edge of the plug after longtime use, compensation sealing is conducted by the reset springs to the edgeof the plug, so that sealing effect damage to the edge of the plug and caused by longtime use is avoided.