The parachute deployment height of sensing reconnaissance submunition has great effect on its landing state and precision. To determine the deployment height of the sensing reconnaissance submunition, Matlab/Simulink simulation platform was used for the motion of parachute-bomb system. The results are in good agreement with the experimental data. And considering the wind, charge number and firing angel etc, the height of the reconnaissance submunition was simulated, the result indicate that the deployment height of 1# charge should be 175~250m, and that of 6# charge should be 150~225m. The method has some certain reference value for deciding the deployment height of other parachute landing submunition.