Aimed at the problems of low electrochemical performance and leakage caused by the inadequate sealing of proton exchange membrane fuel cell,from the perspective of bionics,the bionic structure of the sealing bipolar plate structure of fuel cell was designed by taking the shark teeth and fan shell in nature as the bionic prototype.Four kinds of bionic sealing bipolar plate structures were put forward,and the contact mechanics model of the sealing bipolar plate was established.The comparative experiments between bionic sealing bipolar plates and conventional sealing bipolar plates were carried out in finite element analysis software ABAQUS and ANSYS Fluent.The simulation results show that the stress on the contact surface of bionic sealing bipolar plate is greater and the combination of the two contact surfaces is closer.The inlay combination of one convex and one concave of bionic sealing bipolar plate reduces the effective height of leakage channel,increases leakage resistance and effectively prevents leakage.Bionic sealing bipolar plate has fluid structure coupling sealing effect.There are multiple resistance sections and cavities between bipolar plates,which can cause obvious differential pressure loss to the fluid and effectively avoid fluid leakage.