Photovoltaic module frame, photovoltaic module and photovoltaic system

The utility model discloses a photovoltaic module frame, a photovoltaic module and a photovoltaic system, relates to the technical field of photovoltaic modules, and is used for reducing the cost of the photovoltaic system and improving the installation efficiency of the photovoltaic system. The photovoltaic module frame comprises a first frame and a second frame, and the first frame and the second frame are used for being installed on the two sides, close to each other, of two adjacent photovoltaic modules respectively. Each of the first frame and the second frame is provided with a surface A, a surface B and a surface C, the surfaces A and C are sequentially arranged along the thickness direction of the laminated piece of the photovoltaic module, and the surfaces B are connected to the same sides of the surfaces A and C. The C surface of the first frame is provided with a connecting part used for being connected with the support, and the B surface of the first frame is used for being matched with the B surf