The pressure generator is counted used as a measurement standard instrument by metrological verification departments for high accuracy level, easy operation and automatic verification. It has measurement and control functions, which is superior to digital pressure gauges. The measurement function is the function of digital pressure standard devices, while the control function is unique to pressure generators. A new method to improve the control function is proposed in this paper based on the research on principles of the control function, and the requirements of the verification regulations are further interpreted further combined with the verification software and data, which has certain reference value for better verification work.