The invention discloses an overflow-type ball mill or rod mill material feeding forced water sealing structure, and relates to a sealing structure, which comprises a ball mill (9), a material feeding bending pipe (10) and a water pipeline system (1), wherein one end of the material feeding bending pipe is arranged in the ball mill, a holding screw plate (7) and a sealing ring are arranged on the upper portion of the material feeding bending pipe at intervals, the water pipeline system and the sealing ring are communicated, a waterproof sealing (3) is arranged between the one side of the sealing ring (2) and the material feeding bending pipe, the outer portion of the waterproof sealing is provided with a sealing pressing plate (5), the sealing pressing plate is fixedly connected through a bolt assembly (6), the holding screw penetrates through the holding screw plate, and the end portion of the holding screw (8) closely bears against in the concave groove B (15) on one side surface of the sealing ring. According to the present invention, the water outlet holes and the threaded holes are arranged on the sealing ring, the waterproof sealing is arranged between the one side of the sealing ring and the material feeding bending pipe, and the sealing pressing plate is fixed on the sealing ring through the bolt assembly, such that the purposes of forced fed-material sealing and good sealing effect are achieved.