Aiming at the durability problem caused by the polarization reaction of UAV battery charging, and in order to improve the charging rate of UAV battery by the laser wireless energy transmission system, a P&O constant current pulse charging scheme was proposed. This scheme first uses P&O to track the maximum power point of GaAs thin film photocells, which can quickly and accurately track the current and voltage at the maximum power point, ensuring the energy supply stability of the drone during energy transmission; Subsequently, a constant rheological pulse charging scheme based on P&O was established by combining the output characteristics of P&O and unmanned aerial vehicle lithium batteries, which improved the polarization reaction of unmanned aerial vehicle lithium batteries, thereby enhancing their durability and overall charging rate. The simulation results show that the constant flow pulse charging scheme based on P&O can not only improve the durability of drone lithium batteries, but also reduce the charging time by 289 seconds compared to conventional constant current and constant voltage charging methods, and improve the charging efficiency by 9.45%.