Abstract: Because torpedo turbine engine is more sensitive than torpedo piston engine to the variable working conditions, the turbine engine appears nonlinear behavior when the working conditions change,and the situation becomes worse when the working conditions change in large-scale,leading to difficult power control of the torpedo turbine engine.Therefore,a digital electronic controller of the turbine engine system is proposed in this paper,where a rotation speed signal of the torpedo turbine engine is used to uncouple the effect of rotation speed on controlled fuel flux,and a depth signal is adopted to compensate the variation gain of rotation speed.A variable-parameter proportional integral differential (PID) control algorithm is applied to achieve zero static state error control of the torpedo turbine engine rotation speed without over-adjusting the controlled objects.Simulation results show that the variable-parameter PID control algorithm makes the torpedo turbine engine speed change quickly without over-adjusting fuel flux and rotation speed in the whole process.