Liquid spraying amount regulating device for unmanned aerial vehicle

The utility model discloses a liquid spraying amount regulating and controlling device for an unmanned aerial vehicle. The device comprises a support frame, a liquid storage container, a liquid flow controller, a liquid guide pipe, an infrared height measuring instrument and a signal transmission line, the liquid storage container is fixed above the support frame; the liquid flow controller is fixed on supporting legs at the lower part of the supporting frame, a liquid inlet of the liquid guide pipe is communicated with a liquid outlet of the liquid storage container, and a liquid outlet of the liquid guide pipe is communicated with a liquid inlet channel in the liquid flow controller, so that liquid in the liquid storage container is sprayed to plants on the ground after passing through the liquid guide pipe and the liquid flow controller; the infrared height measuring instrument is fixed to the lower end face of the liquid storage tank and electrically connected with the liquid flow controller through a sig