Abstract: Based on the large strain thaw consolidation theory, a numerical simulation platform of multi-infrastructures interaction was established, and the law of thaw settlement of highway and railway embankments at different adjacent horizontal spaces was studied. According to the analysis of calculated results,it was indicated that too close spacing of adjacent embankments will accelerate the thawing of the underlain permafrost layer. With the increase of adjacent spacing, the interactions of thermal fields between two embankments decrease. For the case of closer adjacent space, the asymmetry of the embankment deformation field referring to the center of the pavement increases with time. With the increase of adjacent space, the asymmetry of deformation field disappears gradually. According to the case study in this paper, when the adjacent space is larger than 20 m, there is no notable superposition interaction influence between the thermal and mechanical fields of different embankments. Therefore, it is suggested that in the areas infrastructures intensively constructed, the safety distance between the structures must be larger than 20 m.