Abstract: Aiming at the problem for long-distance gas pipeline distribution stations, pressure control is not smooth, which caused by large-scale flow fluctuations and large dead-zones in the valve. The exact mechanism control models are hard to establish by the conventional method, and tuning the control parameter is difficult. An improved adaptive generalized predictive control method is adopted. The system model is identified first. The G matrix and the predicted vector of step response coefficients of the system model are calculated without solving the Diophantine equation. For the dead-zone problem, an improved approach is proposed which yielded better results in practical application, thereby proving the viability of these methods.