The invention relates to a solar cell array double-shaft sun tracking mechanism. The solar cell array double-shaft sun tracking mechanism comprises an alpha shaft driving device and a beta shaft driving device. The alpha shaft driving device and the beta shaft driving device are perpendicularly installed and are connected through a U-shaped flange. The sun tracking mechanism can rotate around the two perpendicular shafts, so that a combined transmission mode with the motor drive devices of the orthogonally integrated alpha shaft and beta shaft is adopted by the sun tracking mechanism. The solar cell array double-shaft sun tracking mechanism is compact in structure, small in size, light in weight and capable of being reliably applied to the ontrack repeated unfolding and folding operation and the sun tracking operation of a solar cell array of solar cell array double-freedom-degree sun tracking, achieves double-freedom-degree sun tracking of a solar panel, guarantees that the solar cell array can be kept in the folded state during spacecraft launching, maneuvering flight and returning, and can complete double-freedom-degree sun tracking driving and control when a spacecraft flies on the track, and therefore the solar cell array can complete normal energy supply.