The invention discloses a collapsible multi-nozzle pesticide sprayer which comprises a pesticide spraying unit, an adjusting support unit and a shrinkage unit. The adjusting support unit is connected with the pesticide spraying unit by a connector and capable of vertically and bilaterally moving, ninety-degree folding and shrinking of the pesticide spraying unit can be achieved, and the pesticide spraying unit are provided with a plurality of pesticide spraying nozzles. Compared with an existing product, the collapsible multi-nozzle pesticide sprayer additionally has collapsible function when unfolded amplitude is ensured, the pesticide sprayer firmly vertically and bilaterally moves by the aid of double four-bar mechanisms, and the pesticide sprayer has excellent portability and is matched with a small field manage machine.