Abstract: Aiming at the problems such as surface deformation and groundwater system destruction caused by traditional caving mining, continuous mining and filling mining technology is adopted, the working principle of continuous mining and filling mining technology is introduced, the influence of different ratios of filling materials is studied, and a matching underground filling material conveying system is proposed. On this basis, numerical simulation research is carried out and finally applied to Dongqu Mine. The results show that the maximum surface subsidence of the mined working face is 30 mm, the maximum horizontal movement is 12 mm, and the maximum horizontal deformation is 0.7 mm/m. The above-observed data are all in the Class I range of surface deformation, which does not impact the surface buildings.