Clamping device for valve assembly

The utility model provides a clamping device for a valve assembly. The clamping device for the valve assembly comprises an outer layer fixing plate and an inner layer fixing plate, the outer layer pressing plate is arranged opposite to the outer layer fixing plate; the inner layer clamping plate is detachably arranged on the outer layer fixing plate and the outer layer pressing plate; and the pressure applying assembly can apply pressure to the outer layer pressing plate so as to drive the inner layer clamping plate arranged on the outer layer pressing plate to move and cooperate with the inner layer clamping plate arranged on the outer layer fixing plate to clamp the valve assembly. According to the technical scheme, the inner layer clamping plate is additionally arranged to clamp the valve assembly, the outer layer pressing plate serves as a transmission piece to drive the inner layer clamping plate to move, and therefore the valve assembly does not need to be clamped through the outer layer pressing plate