Frost injury prevention and control method and device for highway tunnel portal in cold region and storage medium

The invention discloses a cold region highway tunnel portal freeze injury prevention and control method and device and a storage medium, the method and device are used for an air curtain system, and the method comprises the steps that a mounting groove is reserved in the position, close to a tunnel portal, of a tunnel portal; the air curtain system is mounted in the mounting groove; the environment temperature of the tunnel portal is obtained, whether the environment temperature meets the preset starting temperature or not is judged, if yes, the air curtain system is started, air is sucked into the air bellow, and the heating device is used for heating the air in the air bellow; and whether the air in the air box meets the preset discharge temperature or not is judged, and if yes, the air in the air box is blown out through the air curtain machine so that an air curtain covering the hole can be formed. The air curtain system is mounted in the mounting groove, the inside and the outside of the tunnel portal ar