Automatic regulating device for horsehead of pumping unit

The utility model discloses an automatic regulating device for a horsehead of a pumping unit. A horsehead body is provided with an inner cavity; the front end of a walking beam of the pumping unit is arranged in the inner cavity of the horsehead body; the two sides of the inner cavity of the horsehead are horsehead side plates; the automatic regulating device is characterized in that at the upper part of the inner cavity of the horsehead, a supporting beam is fixedly arranged between the two horsehead side plates; the lower surface of the supporting beam is an outwards arc-shaped surface and is arranged at the upper surface of the front end of the walking beam; the horsehead side plates are provided with jackscrews by jackscrew nuts, and the jackscrews pass through the horsehead side plates; the position in the walking beam, corresponding to the inner ends of the jackscrews, is provided with a jackscrew seat plate; the jackscrew nuts are fixedly arranged on the horsehead side plates; and after screwing the ja