The invention relates to a storage cabinet convenient to assemble, which comprises a cabinet body; the cabinet body comprises a top plate, a bottom plate, a front door plate, a rear door plate, a left side plate, a right side plate and a mounting frame, one side of the front door plate is hinged to the mounting frame, and a locking piece is arranged on the other side of the front door plate. The top plate, the left side plate and the right side plate are integrally formed in an injection molding mode or can be turned over to form an inverted-U-shaped frame body, the bottom plate, the rear door plate and the frame body are connected in an assembled mode, and the front door plate, the frame body and the bottom plate are connected in an assembled mode through the installation frame. By means of the technical scheme, the storage cabinet convenient to assemble can be assembled, is convenient to install and transport and does not occupy space.