Accurate path following is necessary for UAV mission planning.With respect to the problems of AOGL path following algorithm,which relies on prior knowledge or trial selection,lacks theoretical guidance and may not be optimal,a path following algorithm based on PSO-AOGL is proposed.By multiplying the empirical values of each element in the weight matrix with the coefficient to be optimized,the modified guidance law is derived by substituting the Riccati equation,and the objective function is constructed to find the optimal solution.Under different disturbance wind speed conditions,numerical simulations are carried out for linear and circular expected tracking paths respectively.The results show that PSO-AOGL has better tracking effect and can effectively reduce the tracking position error.