Abstract: The P-U characteristic curve of the PV array in the received side of the laser power transmission system performs multi-peak and has more volatility and worse stability due to receiving the laser with non-uniform and non-instability intensity. This paper built equivalent circuit model about the PV array on the basis of the output characteristic of the GaAs PV cells to analyze the reason for the multi peaks. And then applies Predatory Search Algorithm to dynamically adjust the search space in Particle Swarm Optimization Algorithm to optimize the control mechanism of the particles. The convergence speed,tracking accuracy and stability of the PSO Algorithm have been improved. And which can effectively avoid being trapped in the local optimal solution. Based on the interleaved boost circuit,the feasibility and effectiveness of the MPPT algorithm used in the laser power transmission system were verified by using Matlab/Simulink to simulate.