Chicken farm automatic feeder

The utility model discloses a chicken farm automatic feeder which comprises a feeding device, a conveying pipe provided with a spiral rod along the axial direction at the center, multiple discharge ports below the conveying pipe and a trough below the discharge ports, wherein an outlet of the feeding device is connected with the conveying pipe through an electric control switch; a displacement sensor is mounted on the trough; the output signal of the displacement sensor is led into a control chip; and the output signal of the control chip is connected with the electric control switch. The displacement sensor is used for detecting the amount of feed in the trough; the output signal is led into the control chip; the control chip compares the output signal with the set value; if the output signal is lower than the set value, the control chip outputs a control signal and starts the electric control switch for feeding; and if the output signal is higher than the set value, the electric control switch is closed. Th