The present invention relates to a drain automatic discharge device for automatically discharging various liquid and solid drains such as condensed water, oil, carbon, rust, etc. present in the compressed air line. More specifically, the drain valve is used as a ball valve. And it relates to a drain automatic discharge device for opening and closing the ball valve automatically by the operation of the motor by the operation of the timer.;The present invention is a ball valve 100 that is opened and closed by the handle 110, the drive motor 200 is connected to the gear train 210 and the lever 220 so that the rotational force is transmitted to the handle 110, and the drive motor The closed time of the ball valve 100 is controlled by controlling the driving of the 200 and controlling the driving of the first timer 310 and the driving motor 200 to adjust the open time of the ball valve 100. The second timer 320 for adjusting the characteristics of the controller 300 is formed by the electrical circuit arrangement with the drive motor 200.
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