Tunnel portal anti-icing device

The invention belongs to the technical field of traffic safety, and relates to a tunnel portal anti-icing device which comprises a containing groove, a steel reinforcement framework, a steel plate (7) and a pure steel spring (6). The upper surface of the steel reinforcement framework is integrally door-opening-shaped; the height of the reinforcement cage is greater than the depth of the placing groove; the reinforcement framework and the steel plate (7) are sequentially arranged in the containing groove from top to bottom. The pure steel spring (6) is vertically arranged on the steel plate (7); and the steel reinforcement framework is connected with the steel plate (7) through the pure steel spring (6). In snowy weather, when snow falls into the device, the anti-icing device can bring accumulated snow into the filler, when a vehicle passes through the device, the filler can be extruded to crush the snow and melt the snow, and the snow cannot be accumulated on the road surface to cause icing, and meanwhile, th