Device and method for threshing and redrying tobacco leaves and spraying S-methoprene on line

The invention discloses a tobacco leaf threshing and redrying online S-methoprene spraying device and method.The device comprises a pesticide adding unit, a spraying unit and a controller, the controller is connected with an online production control system, the spraying unit is connected with leaf moistening roller equipment, the pesticide adding unit comprises a pesticide tank and a pesticide conveying pipeline, and the pesticide conveying pipeline is connected with the pesticide tank. The pesticide tank is used for storing an S-methoprene pesticide, the spraying unit is used for spraying the S-methoprene pesticide to tobacco leaves in the leaf moistening roller equipment, one end of the pesticide conveying pipeline is connected with the pesticide tank, the other end of the pesticide conveying pipeline extends into the leaf moistening roller equipment and is connected with the spraying unit, and the pesticide conveying pipeline is provided with a pneumatic film adjusting valve connected with the controller.