To correct the landing error caused by ship movement and sea wind， dynamic model of torpedo-parachute system on each stage is established and simulated by programming， and the results of simulation and dynamic model are verified by real launching test. Then， launching direction and separation time are regarded as controlling parameters， and a new landing error correction method of torpedo-parachute system according to the relationship between landing error and controlling parameters which is derived based on Taylor series is proposed. It is verified by numerical calculation that the landing error can be corrected with the controlling parameters corrected by the proposed method. Compared with multi-objective particle swarm optimization algorithm， according to the numerical calculation on typical condition， the proposed method has faster convergence speed， higher precision and lighter computational cost. The precision of ship mine laying is improved through the proposed method which is used to real-time correct the landing error caused by ship movement and sea wind.