The utility model discloses a waterproof electric automobile charging post. The charging post comprises a box body loaded with a main control board and a charging interface device connected with the box body through a cable. The upper end of the box body is equipped with a herringbone rainproof roof. The box body comprises an outer layer and an inner layer. A hollow layer is arranged between the outer layer and the inner layer. The charging interface device comprises a plurality of charging guns. The charging guns are arranged on each side surface of the box body respectively. A temperature control one-chip microcomputer and a heater are arranged on the inner wall of the box body. A temperature control one-chip microcomputer is in sampling connection with a temperature sensor arranged in the box body. The temperature control one-chip microcomputer controls a normally-open switch used for turning on or turning off an external power supply and the heater. The heater is an electrical heating film pasted on the inner wall of the box body. The herringbone rainproof roof and the three-layer box body structure of the waterproof electric automobile charging post raise waterproof and anticorrosive capabilities of the charging post. The temperature control one-chip microcomputer controls the normally-open switch to control working of the heater and provides a suitable work environment for the box body, and that the charging post can still work reliably in a low temperature environment is ensured.