The invention relates to a frame profile for a solar photovoltaic assembly. The frame profile comprises an outer wall, an upper wall, a lower wall, a bottom wall and a supporting arm, wherein an innerside of the outer wall is vertically connected with the upper wall, the lower wall and the bottom wall from up to down, a laminate mounting slot is formed between the upper wall and the lower wall, atail end of the bottom wall is bent towards a photovoltaic assembly mounting slot to form a C-shaped bending reinforcement portion, the supporting arm comprises a first supporting arm and a second supporting arm, the first supporting arm is vertically connected with a lower surface of the lower wall, the second supporting arm is vertically connected with an upper surface of the bottom wall, the first supporting arm and the second supporting arm are correspondingly arranged, and the middle forms an opening for mounting an angular key. The frame profile is advantaged in that the assembled solarphotovoltaic assembly is made to be lighter, the mounting and application scope is greatly expanded, the manufacturing process is simpler, and production efficiency is effectively improved.