The invention discloses a metal edge enclosing structure and an edge enclosing technology thereof. A metal enclosed edge comprises an object needing edge enclosing and a wrapping edge wrapping the edge needing to be wrapped of the object needing edge enclosing. The inner side of the wrapping edge is provided with a mounting plate inserted in the object needing edge enclosing. The object needing edge enclosing includes a first plate block and a second plate block. The first plate block and the second plate block are installed on the two sides of the mounting plate, connected with each other andclamp the mounting plate to form the metal edge enclosing structure. By arranging the mounting plate on the whole wrapping edge and then splitting the object needing edge enclosing into the first plate block and the second plate block and by the mode that the first plate block and the second plate block are connected and meanwhile the mounting plate is clamped, installation of the wrapping edge is achieved, and in this way, the problems that the opposite angle position of 45 degrees is not sealed, the metal wrapping edge and a door plate is not sealed tightly and straight, and the problems that hands are cut by a flapping edge and the beauty is affected do not exist.