The invention discloses a fuel cell bipolar plate, which comprises an anode plate, a cathode plate and two cooling plates, wherein the anode plate is sequentially superimposed, covered and connected with one cooling plate from bottom to top, the cathode plate is sequentially superimposed, covered and connected with the other cooling plate from top to bottom, the anode plate and the cathode plate constitute a fuel cell unit with a membrane electrode clamped between the anode plate and the cathode plate, the upper surface of the anode plate is provided with a hydrogen horizontal flow channel, the upper surface of the cathode plate is provided with an air horizontal flow channel, and the upper surface of each cooling plate is provided with a cooling liquid horizontal flow channel; and the anode plate, the cathode plate and the cooling plates are respectively provided with a plurality of hydrogen vertical flow channels, air vertical flow channels and cooling liquid vertical flow channels.The bipolar plate is small in flow resistance and can enable the temperature field inside the cell to be uniform in distribution.