The invention discloses a hole multi-functionalization method for realizing water damage prevention and surface settlement control through a surface borehole and belongs to the coal mine green miningtechnical field. According to a grouting filling method, a single ground grouting borehole is formed downward from the ground; overlying rock located at different horizons are grouted through the grouting borehole; grouting horizons in a curved sunk zone include a low-bed-separation horizon and a high-bed-separation horizon; overlying rock fractures in a fracture zone are grouted, so that a water-blocking layer can be formed to cut off a water bursting channel of underground bed separation water damage, and therefore, secondary roof water damage can be prevented; a larger proportion of grout is adopted as the filling material of the low-bed-separation horizon so as to form a high-volume-weight rock stratum filling body; and filling bodies formed by the low-bed-separation horizon and the high-bed-separation horizon in the curved sunk zone together act on the control of surface subsidence. According to the method of the invention, a multi-horizon grouting filling project is realized through the same grouting borehole, and therefore, the utilization rate of the borehole is high, cost is low, a filling rate is improved, the subsidence-reducing rate of the surface settlement is improved, and roof water damage prevention and control is achieved.