ZHA/B type multi-spring pneumatic membrane actuator is to convert the pressure output of the pneumatic adjustment instrument into the change of push rod displacement, which can be connected with the linear stroke regulating valve body, and convert the signal input by the control system into the corresponding position of the valve core, so as to achieve the purpose of controlling the opening of the regulating valve, which has the advantages of uniform force, good stability, large output thrust, small size and light weight.