The utility model provides a vertical reciprocating compressor check valve dismounting device, include: the ram pole, the head end of ram pole is used for being connected with waiting the check valveof dismantling, the subassembly of exerting pressure for be connected with the cylinder, it is formed with spacing hole on the subassembly to exert pressure, the one end of ram pole is passed spacingkong yiyu treats that the center department of the check valve of dismantlement connects, spacing hole is used for injecing the biggest swing angle of ram pole, the ram, the cover is established on the ram pole, and be located the subassembly of exerting pressure deviates from one side of the check valve waiting to dismantle, the ram is used for supplying the operator to grip to the axis directionreciprocating motion who follows the ram pole under operator's action is with the striking the subassembly of exerting pressure, the subassembly of exerting pressure be used for to the cylinder transmission the impact that the ram was applyed to the messenger waits the check valve of dismantling and follows break away from on the cylinder. From this, can realize convenient and fast ground dismantles reciprocating compressor's check valve from the cylinder.