The invention discloses a water level controller for a water tower pool. The right bottom part of a water tower tank is provided with a communicating pipe; the right side of the water tower tank is fixed with a pipe; a bottle is arranged in the pipe; fixed water is placed in the bottle; a soft rope is fixed at the mouth of the bottle; the top end of the soft rope is fixed on a lever bar; the leverbar is arranged at the top end of the pipe; the left end of the lever bar is connected with a key of a double-pole double-throw switch; the double-pole double-throw switch is fixed at the right top part of the water tower tank; a pivot is fixed at the top part of the double-pole double-throw switch; and the pivot is connected with the lever bar. According to the automatic water feeding device forthe water tower, the bottle is used as a suspended matter, gravity or buoyancy is generated along with lifting or falling of the water level, the high-power double-pole double-throw switch is controlled through the soft rope or a pulling line, and working of the water pump is directly controlled. The water level controller is purely a mechanical switch, no complicated circuit exists, the mountingis simple, the making material is low in cost, and rural market promotion is facilitated.