Fuel cell engine

The invention relates to the technical field of aero-engines, and discloses a fuel cell engine to solve the problem that a fuel cell in the fuel cell engine can be polluted by lubricating oil. The fuel cell engine comprises an air compression cavity, a shaftless air compressor and a fuel cell. The air compression cavity is of a through hole structure. The shaftless air compressor is of a magnetic suspension structure and is installed at one end of the air compression cavity. The fuel cell is located in the air compression cavity, and the shaftless air compressor rotates in a self-driven mode and is used for providing compressed air for the fuel cell. Due to the fact that the shaftless air compressor is of a magnetic suspension and self-driven rotating shaftless structure, lubricating oil does not need to be used for lubrication, and a motor structure added with the lubricating oil does not need to be additionally arranged. In the process that the shaftless air compressor provides compressed air for the fuel c