Grounding press block

The utility model relates to a grounding press block which comprises a press block and grounding nails. The press block is provided with flanging edges. A mounting hole is disposed on a bottom surface of each flanging edge. The grounding nails are fixed in the mounting holes. One end of each grounding nail is equipped with a nail head with a conical tip. The nail head is higher than the bottom surface and can be pressed against a surface of a frame of a photovoltaic assembly. When the photovoltaic assembly is mounted, an oxide layer of the surface of the frame of the photovoltaic assembly can be broken by the grounding nails to be directly contacted with a substrate of the frame in a conductive manner, thereby guaranteeing effective grounding of the photovoltaic assembly. Reliable grounding can be realized without any extra parts arranged on the photovoltaic assembly. Meanwhile, the grounding press block enables costs of materials to be lowered and is convenient for installation of the photovoltaic assembly.