Reusable fruit and vegetable seedling stage protection device

The invention discloses a reusable fruit and vegetable seedling stage protection device which comprises a cone frustum-shaped protection cover body, the protection cover body is transparent and is made of polyethylene added with dripping functional master batch, light receiving convex edges are evenly arranged on the protection cover body, a heat dissipation hole is formed in the leeward face of the protection cover body, and the heat dissipation hole is communicated with the protection cover body. A fixed water absorption ring is arranged at the bottom end of the protective cover body in the circumferential direction of the protective cover body, and a plurality of cross-shaped fixed water absorption holes are formed in the fixed water absorption ring. The protection device is only arranged for a single fruit and vegetable seedling, so that the situation that the whole seedling is infected by insect pests or diseases of one seedling is effectively prevented; the protective cover body is of a three-dimensiona