In order to improve the performance of the positive flow variable pump， a sliding mode adaptive control method of positive flow variable pump based on the RBF minimum parameter learning method was proposed.The dynamic characteristics of the electro-hydraulic servo system of the positive flow variable pump were analyzed,and the system identification experiment was carried out to obtain a more accurate system mathematical function model.The sliding mode controller was designed based on the RBF minimum parameter learning method,in the case of nonlinear factors such as system parameter uncertainty,friction interference and system leakage,the tracking response and adaptive control of target flow rate were carried out.Finally,simulation experiment of the positive flow variable pump control system performance was carried out based on MATLAB/Simulink,and compared with traditional PID controller and fuzzy PID controller.The simulation results verified the feasibility and effectiveness of the designed control method.