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两栖车辆传统水上推进方式有履带划水、螺旋桨推进和喷水推进,但推进效率都非常低,最高不高于30%.生物所采用的推进方式,经过上亿年的进化,其功率利用率最高,方式最优.该文设计的仿生推进装置由两伞状翼盘在大行程往复直线行驶机构的带动下,沿车辆纵向进行往复运动,在水流的作用下,向后运动的翼盘自动张开,产生对车辆的向前拉力,向前运动的翼盘自动关闭,以减小水流阻力,这样,两栖车辆随翼盘的往复运动,一直受到向前的牵引力作用,使车辆向前运动.该文对同一翼盘,在不同翼盘夹角,不同运动速度的情况进行仿真计算,得出推进力与推进速度、夹角的关系曲线.为推进装置的实物设计制造提供了依据.“,”The traditional method of propulsion of Amphibious vehicles in water has tracked the water,propeller and waterjet propulsion. But the propulsive efficiency is very low,the maximum not more than 30%. Biological methods used to promote,through the million years of evolution,its power utilization of the highest,the best way. Bionic propulsion system designed in this paper consists of two umbrella-shaped wing plate in the large travel agency travel back and forth,driven by a straight line,Carried out along the longitudinal reciprocating motion of vehicles in the water under the influence of backward movement of the wing disk automatically open,resulting in tension on the vehicle forward,Forward movement of the wing disc automatically shut down to reduce the flow re-sistance. In this way,amphibious vehicles,with the wing disc back and forth movement,has been the role of forward traction,so that forward movement of vehicle. In this paper,the same wing disc,wing disc at different angles,different velocity simulation of the situation. Come forward to promote strength and speed,angle of the curve. To promote the device provides the basis for the physical design and manufacture.