The invention discloses a manufacturing process for an impregnated graphite bipolar plate. The manufacturing process for the impregnated graphite bipolar plate is characterized by comprising four steps of preparing resin impregnation liquid, preheating, performing a pressure impregnation process, and performing a curing process. The manufacturing process has the advantages as follows: the pressure impregnation process is added in the manufacturing process for the impregnated graphite bipolar plate; the impregnated graphite is used to manufacture the bipolar plate, so that the compressive strength and hardness of the bipolar plate are effectively improved, and the generation rate of gas holes is lowered; the contact resistance between the bipolar plate prepared by the invention and the diffusion layer carbon paper of a proton exchange membrane fuel cell is low; the impregnated graphite bipolar plate is high in mechanical property; and the batch production of the bipolar plate can be realized easily.