The invention brings forward a solar energy support guide rail, a clamp block, an intermediate-voltage block, and a side-voltage block in cooperative usage. The guide rail comprises a main body; and a first groove-shaped track is arranged at the top of the main body, a nut track is arranged at one side wall of the main body, and a second groove-shaped track is arranged at the other side wall of the main body. The opening direction of the first groove-shaped track is arranged upwardly; the opening direction of the second groove-shaped track is perpendicular to the opening direction of the first groove-shaped track and is against the main body; the opening direction of the nut track is perpendicular to the opening direction of the first groove-shaped track and is against the main body; and the opening direction of the second groove-shaped track is opposite to the opening direction of the nut track. The solar energy support guide rail can be installed in an outer hexagonal mode or by means of the clamp block; and because of the diversified installation ways, requirements under different backgrounds can be met.