Abstract: In order to solve the efficiency problem existed in the constant pressure variable displacement pump, a variable-speed pump source consisted of the permanent magnet synchronous motor and the fix displacement pump was proposed. Firstly, the unit parameters of the pump source were determined, and a mathematic model was developed based on the analysis to the dynamic requirements of aircraft hydraulic pump. And then, comparing the advantages and disadvantages of different control structure with three closed-loops, dual closed-loops and single closed-loop, a dual closed-loops control structure was designed with the pressure closed-loop and the current closed-loop. Finally, considering the parameter time-variety and the system uncertainty of the variable-speed pump source, a quantitative feedback theory(QFT) controller was designed base on the uncertainty rang and the performance indexes. The simulation results shows that the pressure QFT and current PI controller of pump source can enhance the control accuracy of the pressure, being characterized by good dynamic and robustness.