Abstract: [Objective] The violent and random movement of the ship deck in the complex marine environment brings great difficulties to the UAV landing, and most of the existing UAV landing methods rely on manual intervention and lack sufficient safety. [Method] In order to improve the safety of autonomous UAV landing, a new "V-foot-net" docking device is designed for a certain type of Multi-rotor UAV. The rigid multi-body dynamics model of the UAV and the deck is established, and the simulation of the landing process is carried out under different amplitude of rolling and period conditions to obtain the attitude change process and attitude stabilization time of the UAV landing. [Results] Simulation results show that the "V-foot-net" device has higher docking redundancy under smaller roll period and larger roll amplitude, and achieves attitude stability faster than ordinary landing devices. [Conclusion] The "V-foot-net" device can effectively improve the safety of UAV landing, and the safety boundary obtained can be used as the control basis for UAV landing, and improve the reliability of UAV landing on sea platforms.