Showcase with high fireproof performance

The utility model provides a showcase with high fireproof performance, and relates to the technical field of showcase fire prevention, the showcase comprises a base, the top of the base is fixedly provided with a supporting column, the top of the supporting column is fixedly provided with a top cover, the top of the top cover is provided with a cooling bin, the bottom of the cooling bin is fixedly connected with a liquid nitrogen cooling tank, and the liquid nitrogen cooling tank is fixedly connected with a liquid nitrogen outlet. The top of the cooling bin is movably connected with a top bin cover, the bottom of the top cover is fixedly provided with a plurality of liquid nitrogen spray heads, the tops of the liquid nitrogen spray heads are fixedly communicated with the bottom of the liquid nitrogen cooling tank, one side of the base is provided with an exhaust bin, and the position, close to the outer side, of the top of the exhaust bin is movably connected with a bottom bin cover. According to the fireproo