ABSTRCT: Yushenfu mining area is an important raw coal producing area in northern Shaanxi. Coal development and utilization has a large scale and high intensity, but the fragile ecological environment makes the mine geological environment problems caused by coal mining particularly significant. In order to grasp the development laws of surface cracks caused by coal mining in Yushenfu mining area, reveal the formation mechanism, and put forward a scientific and reasonable treatment model, the typical working faces of Anshan Coal Mine, Caragana Tower Coal Mine and No.1 Coal Mine of Xiaobaodang in Yushenfu Mining area were taken as the research object to carry out the study. The results show that: the surface cracks can be divided into four types: step type, extrusion uplift type, sliding type and tension type, as well as two combination modes of collapse trough and parallel. There is a negative correlation between the performance characteristics of surface cracks and the ratio of mining depth to mining thickness. The surface cracks induced by very shallow coal seam mining, shallow coal seam mining and medium-deep coal seam mining have the dynamic law of lagging mining position 1.0m, advanced mining position 8.5m and lagging mining position 30.14m, respectively. The characteristic of width of boundary cracks and forward slope cracks in working face was increasing until stable. Different from the boundary cracks, the characteristic of width of the reverse slope cracks was increases first and then decreases, and the width of the cracks in the flat area in working face increases first, then decreases, and then increases. The average activity time was 3.7 to 7.0 days. The crack with the activity of "opening first and then closing" is controlled by the dynamic evolution of overlying rock structure, and the fracture with the activity of "only opening and then closing" and "opening first and then closing" were controlled by surface dynamic evolution. The models of "crack treatment" and "gully restoration" are suitable for the treatment of through fractures at the bottom of the gully. The treatment models of "crack filling" and "ridge and gully transformation" are beneficial to the scientific treatment and ecological restoration of slope cracks in the loess gully region.