The utility model relates to a scraped car cleaning system which comprises a spray head for flushing a car body. The scraped car cleaning system further comprises double tracks, a transfer car on the tracks and a ground chain mechanism dragging the transfer car, and the ground chain mechanism comprises an annular chain. The double tracks and the annular chain all pass through a front position X1 and a rear position X2, an upper water supply pipe, a lower water supply pipe, a left water supply pipe and a right water supply pipe are arranged around the positions, passing through the position X1, of the double tracks and the annular chain, two or more spray pipes which spray water to the transfer car and a scraped car on the transfer car are evenly connected to each water supply pipe on each side, and each spray pipe comprises valves and spray heads, wherein the valves and the spray heads are connected in sequence. According to the scraped car cleaning system, especially the dirt of a lot of to-be-demounted parts on the lower portion of the car body is thoroughly cleaned up, the sanitary environment of subsequent jobs is greatly improved, the subsequent demounting procedure can be carried out efficiently, reasonably and finely, the parts can be classified, divided and put in storage according to the different specifications and models, the waste degrees and the damage degrees of the parts, and therefore the subsequent demounting quality and benefits are improved.