Self-sealing well cover for underground engineering construction based on heat evaporation principle

The invention belongs to the field of underground engineering construction equipment, and particularly relates to a self-sealing well cover for underground engineering construction based on the heat evaporation principle. The self-sealing well cover comprises a base and a cover body, the lower edge of the base extends inwards to form a supporting seat, and the upper edge of the base extends outwards to form a clamping seat; the edge of the cover body is attached to the base, and the cover body is provided with a plurality of drainage holes, a mounting groove, a liquid storage box and a heat conducting plate, wherein the upper ends of the drainage holes are formed in the upper surface of the cover body, the lower ends of the drainage holes are formed in the inner side wall of the lower endof the cover body; the mounting groove is formed in the center of the upper surface of the cover body; the liquid storage box is fixedly mounted in the mounting groove, a plurality of vertically-arranged supporting strips are