The invention discloses a coating metal plate, comprising a base plate, a chemical processing layer on the front face of the base plate, a conductive coating on the back face of the base plate, and a paint layer outside the chemical processing layer, wherein, the side of at least one opposite side of the front face of the coating metal plate is provided with a conductive belt having exposed chemical processing layer. The coating metal plate of the invention is used for processing the shell of the products such as a computer case needing the electromagnetic interference test and the like.