A robust control system incorporating parameter adaptation is developed to mitigate the nonlinearity and parameter uncertainty in pressure control systems of pintle solid rocket motors. The mathematical correlation between pressure and pintle displacement is established through the zero-dimensional interior ballistic model, while the state space equation is derived by integrating the effects of motor inertia load dynamics. Develop a nonlinear control system utilizing robust system and parameter adaptive. By means of simulation, the control performances of traditional PID controller, robust controller, and adaptive robust controller were compared, revealing that the adaptive robust controller exhibited superior control effectiveness.