The construction of mountain roads often promotes the occurrence of landslides, and poses a serious threat to the safety of driving and the geological environment. This paper introduces a new type of road landslide area anti-sliding structure based on thermal factors. The type door rigid frame-pile arch system, it is mainly composed of three parts: the gate type anti-slide pile, the reinforced concrete arch plate, and the mouth shaped guard pier. Its characteristics are: door-type anti-slide pile role is to resist the landslide thrust and the main road as a support structure; reinforced concrete arch between the plate as the door-type anti-slide pile and pile retaining force transmission member, active play arch structure compression high strength, can change the mechanical properties of stress paths, so that the lateral landslide sliding force to reduce; shaped mouth guard pier to control the deformation and solid slope, and enhance the overall stability of the system. The FLAC3D simulation results show that the stress distribution of arch plate is more uniform, with the increase of the sliding force, the stress in the arch foot and the lower part of the arch plate increases rapidly, which accords with the principle of soil arching. At the same time, the contact beam gradually works, The landslide thrust is transmitted to the front row of piles. The stress of the rear row of piles increases more than that of the front row of piles. The stress of the upper part of the beam increases more than that of the lower part of the beam. The overall trend is more and more gentle.