A robust control strategy based on dynamic surface is proposed for an electro-hydraulic proportional position system with load disturbance, which can implement high precision of the position tracking. Dynamic surface method was introduced in the strategy to avoid the inherent “Explosion of complexity” problem of the traditional backstepping method and to enhance the availability of the strategy in the practice system. All the closed-loop signals of the system were stabilized with approaching performance at tracking under the function of robust controller, proved via Layapunov method. Finally the effectiveness of this control strategy is certified in MATLAB simulation.