The pet film coated steel plate aluminum profile processing color coating plate has both polymer and steel plate strengths, both polymer excellent corrosion resistance, decorative, and steel plate degree and easy to process, which makes the coating products have excellent practicality, decorative, processing, durability.The excellent corrosion resistance function of coated steel sheet is first accomplished by forming a fine coating on the substrate surface of the coating, and the fine coating can hinder the touch of corrosive particles, water, oxygen and harmful substances and metal.