The invention provides a hydrogen power battery reactor based on graphene coatings. The reactor comprises a fuel chamber, a reaction unit arranged in the fuel chamber, and a partition plate arranged in the reaction unit. The interior of the fuel chamber is hollow. The fuel chamber is provided with a hydrogen discharge opening that is communicated with the interior space of the fuel chamber. A hydrogen storage material is filled between the reaction unit and the fuel chamber. The reaction unit is provided with an opening that is communicated with the interior space of the fuel chamber. The opening is provided with a pressure valve. The pressure valve can adjust the pressure of hydrogen in the fuel chamber. Graphene coatings are evenly painted on the front surface and back surface of the partition plate in the reaction unit. Heat transmission is carried out between the graphene coatings and the partition plate. Heat conductive wires are doped in the graphene coating. The reactor has theadvantages that by setting graphene coatings on the partition plate, the partition plate is protected, the heat dissipation efficiency of the reactor is improved at the same time, and the normal operation of the reactor is guaranteed.