Abstract: Wave gliders absorb wave energy to achieve mechanical propulsion, and the improvement of their hydrofoil drive efficiency has been a technical point. In this paper, the dynamic equations of the hydrofoil spring mechanism are derived, and a tandem hydrofoil simulation pool is built by the FLUENT-UDF method, and the analysis reveals the inadequacy of the symmetric hydrofoil spring-driven mode. It is proposed to be improved by an asymmetric reply mode, and the simulation is verified. The spring asymmetric drive mode formed by raising the lifting point compensates the following phase difference between the hydrofoil and the wave, so that the glider can enter into the sliding state again quickly, which can effectively improve the hydrofoil drive efficiency of the wave glider. Therefore, the position of the spring lifting point of the hydrofoil on the glider can be increased according to the actual size in the project.