The utility model relates to a grouting device capable of preventing a stone from falling into a hole. The utility model aims at providing the grouting device capable of preventing the stone from falling into the hole, which is simple in structure and convenient to manufacture. The utility model adopts the technical scheme that the grouting device capable of preventing the stone from falling into the hole is characterized by comprising an inner pipe and an outer pipe, wherein the outer pipe is sleeved with the inner pipe; external threads are formed at the upper part of the inner pipe; the top of the outer pipe is connected with a bearing; the inner pipe is sleeved with the bearing; a winch capable of being matched with the external threads on the inner pipe to achieve up-and-down movement of the inner pipe is arranged on the bearing; a grouting plug and a nut are sequentially arranged below the outer pipe; the inner pipe is sleeved with the grouting plug and the nut; and the nut is in threaded connection with the inner pipe. The grouting device is applicable to an anti-seepage treatment project of a rock foundation of a hydraulic structure.