The invention discloses a self-balancing self-sealing leaking device which comprises a vertical leaking pipe, a switching ball installed inside the leaking pipe, a switching ball rotary shaft for fixing the switching ball, a rotary wheel and a heavy ball, wherein the rotary wheel is installed in the switching ball and is in gear engagement with the switching ball rotary shaft, and the heavy ball is connected with a rotary wheel rigid rod. The self-balancing self-sealing leaking device is characterized in that the switching ball is hollow, the switching ball rotary shaft is located in the center line of the switching ball, the switching ball can rotate around the switching ball rotary shaft, switching ball rotary shaft spline teeth are arranged on the lower side of the center of the switching ball rotary shaft, a switching ball rotary shaft thin shaft is arranged on the right side of the switching ball rotary shaft spline teeth, the switching ball rotary shaft thin shaft is sleeved with a vertically-installed shaft connecting sleeve, the lower end of the shaft connecting sleeve is sleeved with the horizontally-installed rotary wheel shaft, the left side of the rotary wheel shaft is sleeved with the rotary wheel, rotary wheel teeth are formed in the upper side of the rotary wheel, the rotary wheel teeth are meshed with the switching ball rotary shaft spline teeth, the rigid rod is fixedly installed on the lower side of the rotary wheel to be used as a heavy ball connecting rod, and the other end of the heavy ball connecting rod is fixedly provided with the heavy ball.