Directed towards the folded mechanism of folding wing aircraft and on the basis of gear meshing mechanism,a kind of planetary gear transmission mechanism has been put forward to achieve the folding of aircraft wings.Dynamics simulative analysis was carried out on two kinds of mechanism by the use of ADAMS software.Through contrastive analysis on the two mechanisms,it has been proved that the planetary gear mechanism designed for the folding wing aircraft could effectively minimize the contacting force between pinions than the original gear meshing mechanism,improve the motion stability characteristics of mechanism,lowering the requirements on the torque of driving motor,all of these were propitious to enhance the efficiency of mechanism.By means of simulative analysis,it was testified that the being designed planetary gear mechanism could be regarded as the scheme of folded transmission mechanism for the folding wing aircraft.