The invention discloses an electric automobile charging port structure, which comprises a charging chamber, a chamber cover, a charging port, a charging socket, air sacs, an air pump, an inflation pipe, seal covers and an air pump controller. The charging chamber is formed by a bottom plate and four side plates; the charging port is formed in the bottom plate of the charging chamber; each air saccomprises a sac body and an air sac port formed in the front side of the sac body made of silicon rubber, and the bottom edge of each sac body and the peripheral edge of the bottom plate are hermetically connected; the air pump is arranged on the rear side of the charging chamber; the seal covers cover the air sac ports in an openable and closable manner; after a trip computer monitors that charging of an automobile rechargeable battery is finished for certain time, the air pump controller controls the air pump to inflate the air sacs; when the seal covers cover the air sac ports, the air sacsare inflated through the air pump to expand to form an air layer outside the charging socket. The electric automobile charging port structure has the advantage that by isolation protection of the charging socket, the charging socket is protected from bad influences caused by water or moisture.