Abstract:The manufacturing and construction errors of the secondary mirror in the solar power station and the motion state of the heliostat will cause the secondary reflected light from the heliostat cannot fall into the area of the heat receiver accurately, thus the cut-off rate of the heat receiver cannot meet the requirements. By analyzing the optical path principle of the secondary reflection and the imaging principle of the heliostat on the secondary reflection mirror, this paper determines the correction method of the heliostat pointing deviation, designs the corresponding hardware system, and according to actual engineering application verification, provides a reference for the successful operation of the same system of the solar power station.