The invention discloses a special angle-adjustable pesticide spraying device for vineyards. The device comprises a vehicle and a pesticide box fixed on the vehicle, wherein multiple walking wheels aremounted at the bottom of the vehicle, a driving belt pulley is fixedly mounted on a walking axle between a set of walking wheels and connected with a driven belt pulley through a synchronous belt, the driven belt pulley is fixed at the shaft end of a stirring shaft mounted in the pesticide box, the shaft end of the stirring shaft extends out of the pesticide box, and a plurality of stirring blades are fixedly mounted outside the stirring shaft. The device has the benefits as follows: when the vehicle runs, the driving belt pulley rotates synchronously, the stirring shaft rotates under the transmission action of the synchronous belt to drive the stirring blades to rotate, a pesticide liquid in the pesticide box is stirred, and reduction of the pesticide spraying effect due to pesticide deposition is prevented. Meanwhile, the pesticide spraying angle and the pesticide spraying distance can be adjusted flexibly, the pesticide spraying effect can be improved conveniently, and the device is simple in overall structure, convenient to operate and widely applicable to pesticide spraying operation in agriculture and forestry.