Abstract: In order to increase the mining safety of shallow coal seam working face in mountainous area and reduce the occurrence of landslide and other geological disasters, taking 11101 working face of Pusa coal mine in Nayong county as the engineering background, the laws of overburden caving and surface subsidence of fully mechanized mining face in shallow coal seam in mountainous area are studied by using numerical simulation and physical simulation method.The results show that the first caving step distance of the direct roof is 30 m, the first weighting step distance of the basic roof is about 50 m, and the average periodic weighting step distance of the basic roof is about 20 m; when the working face advances to about 50 m, the mining impact of the working face spreads to the surface; the maximum basic roof subsidence is 2.13 m, the maximum surface subsidence value is 1.45 m, and the maximum surface horizontal movement value is 0.27 m.The mining of shallow coal seam working face under mountainous landform shows a unique form of subsidence, and the surface subsidence curve presents a U shape.The farther the working face is from the surface, the greater the bending deformation range of rock stratum is, and the closer the working face is to the surface, the greater the impact on the surface.The research results can provide reference for the safe mining of similar working face.