In order to satisfy high performance packaging requirement of microcrystal resonator,a discharge door system of vacuum oven for microcrystal resonator was developed based on the mechanicalelectricalpneumatic integration design concept.For good sealing and high reliability,the technical scheme of the system structure was put forward,which was composed of a pressing mechanism on Z-axis direction,a lifting mechanism on Y-axis direction and antidrop protection mechanism.For low impact and low energy consumption,the pneumatic circuit was designed in detail,and its key parameters were determined based on the mathematical model and simulation analysis of the circuit.Aiming at motion asynchronism of the system,the motion synchronization was simulated and analyzed to verify the pneumatic circuits rationality.Finally,the prototype test result shows that the system runs stably and fully meets its expected functional requirements and key performance indicators.