In this paper an optimal control method for parafoil system homing planning is introduced, which includes multi-phase homing arrangement, optimal homing path calculation using genetic algorithm(GA), and Bezier curves based path planning for parafoil terminal guidance to deal with the situation of variable glide ratios. L1 nonlinear algorithm is adopted to make trajectory tracking. Comparison simulations results show that L1 tracking algorithm has more rapid response speed, higher precision and better wind resistance than PD tracking algorithm in homing path planning with different initial positions and with or without wind.