The steel plate pretreatment line is designed and manufactured by absorbing the advantages of similar products at home and abroad. The main machine of the rust removal department (shot blasting cleaning) adopts a high-efficiency shot blasting device and a curtain-type shot sand separator; the cleaning department uses special high-strength nylon Rolling brush and high-pressure fan two-stage cleaning device; preheating and drying department adopts multiple heating methods; painting department adopts high-pressure airless spraying method. The modified complete set of equipment adopts PLC control, which is a large-scale complete set of advanced equipment.