Photovoltaic system for agricultural greenhouse

The invention discloses a photovoltaic system for an agricultural greenhouse. Aiming at solving the problem that sunshine entering the greenhouse is impeded by solar cell panels, the invention discloses the following scheme: the photovoltaic system comprises a supporting steel frame, a first steel frame group, a second steel frame group and a plurality of solar cell panels, wherein the first steelframe group is fixed on one side of the outer wall of the top of the supporting steel frame through bolts, the second steel frame group is fixed on the other side of the outer wall of the top of thesupporting steel frame through bolts, one sides, in contact with each other, of the first steel frame group and the second steel frame group are fixed through bolts, and a first thin film is adhered to the outer wall of the top of the second steel frame group. An illumination sensor of the photovoltaic system is set with low and high illumination intensity critical values, when the illumination sensor receives a signal und