Abstract: In order to study the surface subsidence law and its influencing factors of inclined coal seam in mountainous area under the condition of repeated mining, taking the first mining face of the lower coal group in south No.6 mining area of Zhenchengdi Mine as an example, the main surface movement and deformation parameters of the 28620 working face where the observation station is located are obtained, and the settlement law and mechanism are analyzed. The analysis of the observation results shows that, as the topography and goaf conditions on both sides of the studying working face are similar, the subsidence curves appear asymmetrical in the dip principle section, the main reason is the combination of micro-topography difference, surface vegetation and formation time difference of goaf. The subsidence law under the compound influence of geological and mining factors cannot be simply applied to the law under the influence of single factor. The results can provide guidance for local mining and protection of ground features, and provide reference for the research of mining subsidence under the influence of other compound factors.