The invention relates to the technical field of new energy, and discloses a pop-up charging gun for a new energy automobile. The charging gun comprises a charging gun shell, a charging port, a first charging wire, a charging head and a first sliding groove. By designing a thermistor, the first sliding groove, a second sliding groove and a first electromagnet, the charging gun still works after an automobile battery is fully charged, so that electric energy in the charging gun can only be dissipated in a heat form, the magnetic force of the first electromagnet is controlled to be reduced through temperature rise sensed by the thermistor, and therefore the magnetic attraction force to a magnetic block is reduced; a magnetic block and a buffer block are popped up to act on the end face of the charging port through the elastic potential energy of a pressure spring, and meanwhile, the popping of the magnetic block enables the magnetic repulsive force on a magnetic buckle to be reduced and the magnetic buckle to move away from a slot under the action of self gravity and a tension spring, so that the charging head is separated from the charging port under the action of the elastic potential energy of the pressure spring, the connection between the charging head and the charging port is cut off, and the damage to the automobile battery caused by charging the battery after the automobile battery is fully charged is avoided.