In response to the problem of excessive cabin pressure rate of change when using typical pneumatic cabin pressure regulators for fighter jets under high altitude airport conditions, this paper proposes a solution to add an exhaust bypass controlled by a high-speed solenoid valve to the outflow valve control chamber. The working principle of this solution is analyzed, a mathematical model of the cabin pressure regulation system is established, and a control law for cabin pressure increase and decrease rate is designed, The dynamic characteristics of the cabin pressure regulation system under high altitude airport conditions were calculated on the MATLAB/Simulink software platform. The calculation results showed that through a reasonable design of the cabin pressure increase and decrease rate control law, the high-speed solenoid valve can effectively control the cabin pressure increase rate during the pressurized flight process and the cabin pressure decrease rate during the landing stage of the high altitude airport, verifying the effectiveness of the proposed solution.