The invention relates to a plunger sliding shoe component durance testing device. According to the plunger sliding shoe component durance testing device, a lower lid is internally provided with a plunger hole and a sliding shoe hole, an upper lid is internally provided with a pressing block hole, the plunger is installed in the plunger hole the sliding shoe is installed in the sliding shoe hole, a pressing block is installed in the pressing block hole of the upper lid, the upper lid and the lower lid are connected through a screw, the other end of the adjustable screw penetrates through the upper lid and is movably connected to the pressing block to adjust the pressing block to coincide with the sliding shoe, a motor is connected to a hydraulic pump through a coupling, an oil inlet of the hydraulic pump is connected to an oil tank, an oil outlet is connected to an oil inlet of an overflow valve, one end of a pressure reducing valve is connected to an oil inlet of a two-position two-way magnetic exchange valve, an oil outlet of the overflow valve is connected to the oil tank, the other end of the pressure reducing valve penetrates through the lower lid and is connected to an upper cavity of the plunger, an oil outlet of the two-position two-way magnetic exchange valve is connected to a lower cavity of the plunger, and an electromagnet of the two-position two-way magnetic exchange valve is connected to a counter.