The hydrofoil with better hydrodynamic characteristics can greatly improve the hydraulic performance in the process of motion. However， as the boundary layer separation occurs on hydrofoil， the drag force will increase and stall presented a vital problem. The local moving surface boundary-layer control technology base on immersed boundary method was applied to accurately capture the flowing character and hydrodynamic characteristics. The influence of the motion parameters such as the launching time（angle of attack）， position，length and velocity of the moving surface on the lift coefficient， stall angle delay and flow field information was compared. The results show that the flow separation control and hydraulic performance can be improved best， when the moving surface is located at the trailing edge of hydrofoil upper surface. The best load case is that length S=0.14， speed K=3 and angle of attack is 45°. Secondly， is length S=0.38， speed K=1 and angle of attack is 28°.