Photovoltaic frame, photovoltaic module and installation structure of photovoltaic module

The utility model discloses a photovoltaic frame, a photovoltaic assembly and an installation structure of the photovoltaic assembly, and relates to the field of photovoltaic technology. The photovoltaic frame comprises a cavity and an extension piece connected with the cavity; the cavity comprises a rectangular accommodating cavity; the cavity comprises a first side wall and a second side wall which are located on the two sides of the containing cavity in the direction from the cavity to the extending piece. The cavity further comprises a third side wall and a fourth side wall located on the two sides of the containing cavity, the extending direction of the plane where the third side wall and the fourth side wall are located intersects with the extending direction of the plane where the first side wall is located, and the plane where the third side wall is located is located on the plane where the extending piece is located. The first punched hole penetrates through the first side wall in the thickness direc