A reinforcing structure for a high-pressure water-rich goaf is used for effectively conducting grouting reinforcement on the high-pressure water-rich goaf. The reinforcing structure for the high-pressure water-rich goaf comprises reinforcing boundary grouting holes, reinforcing area grouting holes, water drain holes, grouting pipes, grouting bag reinforcing bodies and a gravitational flow grout reinforcing body, wherein the reinforcing boundary grouting holes are arranged outside the reinforcing periphery of the goaf at intervals and extend to the top of the goaf from the ground in a drilled mode, the reinforcing area grouting holes and the water drain holes are arranged inside the goaf at intervals and extend to the top of the goaf from the ground in a drilled mode, the grouting pipes extend into the reinforcing boundary grouting holes and the reinforcing area grouting holes respectively, the grouting pipes extending into the reinforcing boundary grouting holes are sleeved with grouting bags, the grouting bag reinforcing bodies are formed when grout in the reinforcing boundary grouting holes is solidified outside the reinforcing periphery of the goaf, and the gravitational flow grout reinforcing body is formed when the grout inside the reinforcing area grouting holes is solidified inside the goaf.