A ship will bear large vertical and lateral overloads when dropped into water， which imposes adverse effects on the structural strength and stability of the ship. The overloads can be reduced by controlling the pitching angle of the ship. In order to study the influence of the pitching angle on overload reducing， LS-DYNA is used to simulate the landing process at different angles. The acceleration curves of landing process under different working conditions are obtained， and the simulation results are verified by the fall-down test. The results show that the reasonable entry angle can effectively reduce the ship’s water overloads. The work in this paper can provide the basis for the landing load reduction of the sea airdrop system.