为探讨东北高纬度岛状多年冻土区路基路面病害原因,对漠北公路沿线冻土路基不均匀沉降变形状况进行了分析。基于漠北公路沿线不同冻土条件和工程措施下各层土体沉降变形状况,探讨路基沉降变形主要发生的土层部位、路基沉降变形破坏原因等。分析结果表明:路基施工完成后早期路基变形较大,主要由工后不均匀沉降变形引起,变形部位主要发生在原天然地面下季节活动层;由于运营时间较短,由多年冻土融化引起的沉降变形很小。路基沉降变形主要发生在暖季,在冷季(11月～次年6月)路基基本保持稳定,变形很小。路基整体变形状况与冻土含冰量、冻土地温有一定的关系。高温多年冻土区比低温多年冻土区变形大。 In order to investigate the causes of the subgrade and pavement diseases in the permafrost region in northeast latitude, the uneven settlement of the permafrost subgrade along Mobei Highway was analyzed. Based on the conditions of settlement and deformation of soil layers under different frozen soil conditions and engineering measures along the Mobei Highway, this paper discusses the soil parts mainly caused by subsidence deformation of roadbed and the reasons for the settlement and deformation of subgrade settlement. The analysis results show that the deformation of the embankment is mainly caused by the uneven settlement after the completion of subgrade construction. The deformation mainly occurs in the seasonal active layer under the original natural ground. Because of the short operation time, the subsidence caused by the permafrost melting Small deformation. Subgrade settlement and deformation occur mainly in the warm season. In the cold season (November to June), the roadbed basically remains stable with little deformation. The overall deformation of embankment with frozen soil ice content, the temperature of frozen soil have a certain relationship. High temperature permafrost than the low temperature permafrost deformation.