The invention relates to a paint spraying device, in particular to an environmentally-friendly paint spraying device of a double-splitting wire fly trolley and aims to achieve the technical effect of providing the environmentally-friendly paint spraying device of the double-splitting wire fly trolley, wherein the environmentally-friendly paint spraying device is high in environmental protection performance. To achieve the technical effect, the environmentally-friendly paint spraying device of the double-splitting wire fly trolley comprises a base, a placement seat, a first sliding rail, a driven wheel, a second sliding rail, a fixing plate, first spraying guns, a second spraying gun, a third spraying gun, a first supporting rod, a second supporting rod and the like. The placement seat is located on the left of the first sliding rail, the top of the placement seat is provided with a groove, the first sliding rail is provided with a first sliding block, the front side of the first sliding block is connected with a connection rod in a hinged manner. By means of the environmentally-friendly paint spraying device of the double-splitting wire fly trolley, the effect of high environmental protection performance is achieved.