The utility model discloses a function integrated spraying device which is integrally arranged on an agricultural vehicle, is dragged by the agricultural vehicle and comprises a fixing frame, a spraying system, an electric folding spraying rod frame unit and a spraying rod connecting device. The fixing frame is arranged on an agricultural vehicle, a pesticide box is arranged on the fixing frame, and a front fixing frame and a rear fixing frame are arranged on the fixing frame to fix the pesticide box. The spray rod connecting device is arranged on the rear fixing frame, and a lifting electricpush rod is arranged on the spray rod connecting device; the electric folding spray rod frame unit is movably connected with the spray rod connecting device, the other end of the lifting electric pushrod is connected with the electric folding spray rod frame unit, and lifting of the electric folding spray rod frame unit is controlled by the lifting electric push rod. The spraying device is combined with an existing agricultural tricycle or quadricycle, mounting and dismounting are convenient, automatic lifting and folding of the spraying rod frame and automation of spraying are achieved, remote monitoring and management are achieved, operation is easy and convenient, and the spraying operation efficiency is greatly improved.