The invention discloses a spliced metal plate, which comprises a long strip shaped first spliced block and a long strip shaped second spliced block. The edge position of the first spliced block vertically stretches downward and is provided with an accommodating part equipped with an opening. The edge position of the second spliced block vertically stretches downward and is provided with an embedment part. The accommodating part and the embedment part are abutted together, and the end of the embedment part stretches into the accommodating part through the opening and is in snap connection with the accommodating part. The spliced metal plate also includes a front end cover and a back end cover. The front end cover is connected to the front ends of the first spliced block and the second spliced block along the length direction, and the back end cover is connected to the back ends of the first spliced block and the second spliced block along the length direction. The front end cover, the back end cover, the first spliced block and the second spliced block together form a groove structure with an opening bottom. The accommodating part and the embedment part are in snap connection to form an integral structure, and form a reinforcing rib structure of the spliced metal plate, thus greatly enhancing the strength of the spliced metal plate.