The utility model provides an embossing PET (Polyethylene Terephthalate) composite colorful steel plate. The colorful steel plate comprises a substrate, wherein a chemical treatment layer is arranged on the upper surface of the substrate, a back paint layer is arranged on the back surface of the substrate, the chemical treatment layer is coated with a glue layer, and an embossing PET composite colorful membrane is arranged on the glue layer. The composite colorful steel plate shows a metal effect of a stainless steel plate, improves the metal texture on the surface of plates, effectively solves the problems that the cost is high and products are not environmentally-friendly, and improves the product profitability.