The invention discloses a construction method for a solar power generation station foundation. The construction method comprises the following steps that firstly, a plurality of steel bars are arranged in a crossed mode, and a matrix solar power generation module mounting area is obtained through partitioning on the ground; secondly, ground piles are embedded in positions A where the steel bars are crossed, all the ground piles arranged in a power generation station in a dot matrix mode are connected through a crossed steel bar network, and a stable foundation structure is formed; and thirdly, solar power generation units are orderly arranged in the solar power generation module mounting area obtained in the first step through supports, the supports are in serial/parallel connection through solar power generation unit locking members, and the solar power generation unit locking members and the steel bars are fixedly connected. According to the construction method provided by the invention, the ground piles connected through the steel bars, and the solar power generation module mounting area are designed for regions with the adverse natural conditions such as deserts and gobi deserts, and an integrated solar power generation station foundation structure can be formed. By adoption of the construction method, the solar power generation station sufficient to resist strong wind can be built, self operation of the power generation station can be basically achieved, and the station can be applied to renewable energy acquisition and environmental governance of arid desert regions.