Abstract: An assembleable and detachable metal storage cabinet, comprising: a metal housing holding a different number of drawers and a plurality of drawers slidable in the metal housing. 3/16? screws and bolts are used to connect a drawer front panel to a drawer left side panel and a drawer right side panel to form a drawer, and used to connect a base frame, a rear panel, a left side panel, a right side panel and a top cover to form a metal housing. Besides, pulling pegs are used to connect a drawer bottom panel, a drawer rear panel, a drawer left side panel and a drawer right side panel to form a basis of the drawer. In this way, a firm, assembleable and detachable metal storage cabinet can be formed. Additionally, a new lock system, which is composed of a welded structural lock frame, is installed in this metal storage cabinet to forbid the drawers being concurrently pulled out.