The utility model relates to the technical field of machinery use appurtenance, in particular to an appurtenance for dismouting of valve class, comprising a supporting bar, be provided with hoisting device and at least one clamping device on the bracing piece, hoisting device is used for the valve to promote, clamping device is used for fixed support bar, hoisting device and valve detachable are connected, work as when clamping device fixes, hoisting device's the peak that highly is higher than the valve, can select with the clamping device centre gripping on the pipeline that the valve body detachable with the valve is connected, make the hoisting device rigidity on the bracing piece, and then can more easy promotion through hoisting device realization valve, does not need the manual work to carry out removing of valve and lift, reduced the potential safety hazard of dismouting in -process, avoid causing the damage to valve itself, practiced thrift manpower and materials.