The invention provides an air conditioner humidifier. The air conditioner humidifier comprises a water tank. A fixing frame is installed in the water tank. A connecting rod is fixed to the fixing frame. Electric water conveying gears are installed at the two ends of the connecting rod. A water inlet pipe is installed on the upper left side of the water tank. A water outlet pipe is installed on the upper right side of the water tank. The water inlet pipe is connected with a water conveying pipe. The water conveying pipe is connected with the water outlet pipe. The water outlet pipe is connected with a water spraying head. The electric water conveying gears are arranged at the connection position between the water inlet pipe and the water conveying pipe and at the connection position between the water conveying pipe and the water outlet pipe. The water inlet pipe, the water conveying pipe and the water outlet pipe are filled with water. A battery is arranged outside the water tank. The battery is electrically connected with the electric water conveying gears. Water is contained in the air conditioner humidifier. When an air conditioner is turned on, the electric water conveying gears spray water out, and the spray quantity can be adjusted according to the on-time of the air conditioner; in this way, a room is kept wet and not dry, and people feel comfortable when in the room with the air conditioner.