Forestry pest killing device

The utility model belongs to the field of biological killing devices, and particularly relates to a forestry pest killing device which comprises a pesticide box, universal wheels are installed at the four corners of the bottom end of the pesticide box, a pushing frame is installed on one side wall of the pesticide box, and a fixed cylinder communicated with the pesticide box is installed at the top end of the pesticide box. A mounting rod is rotationally connected to the top end of the fixing cylinder, spraying pipes are hinged to the two sides of the top end of the mounting rod, angle adjusting mechanisms connected with the spraying pipes are mounted at the top end of the mounting rod, a first bevel gear located in the fixing cylinder is mounted at the bottom end of the mounting rod, and a motor is mounted on the outer side wall of the fixing cylinder; an output shaft of the motor is connected with a second bevel gear meshed with the first bevel gear. According to the device, liquid medicine can be quickly s