The invention discloses a photosynthetic heat isolation solar panel and a preparation method thereof. The photosynthetic heat isolation solar panel is prepared from polycarbonate, an antioxidant, a brightener, a photosynthetically active radiation light conversion agent with the feature of 660 nm and an infrared blocking agent, wherein the infrared blocking agent is zinc-doped ATO nano powder; the molecular formula of the ATO nano powder is (ZnxSb0.1Sn0.9-x)O2, and x is greater than or equal to 0.05 and less than or equal to 0.2. The photosynthetic heat isolation solar panel disclosed by the invention converts ultraviolet rays and blue-green light in the sunlight into red light of 660 nm which can be just matched with the photosynthetically active absorption spectrum of plant photosynthesis, so that the utilization rate of the sunlight by plants is increased; moreover, the photosynthetic heat isolation solar panel can further effectively absorb infrared radiation in the sunlight and fulfill the aim of heat preservation and isolation, and can achieve the effects of increasing the yield and improving the quality when applied to occasions such as agricultural greenhouse, greenhouse planting and a sunlight house.