The invention provides a mobile terminal assembly method and a mobile terminal. After a display module is laminated with a cover plate, side edge sealing glue comprising a main body part adhered on side faces of two opposite side edges and an extension part extending to a lamination position of the cover plate and a main bracket of the mobile terminal is coated on a group of two opposite side edges along the display module on the cover plate, and the cover plate is laminated with the main bracket of the mobile terminal through the extension part. Therefore, compared with the traditional assembly process, the one-step gluing process can be effectively reduced, the complexity of the assembly is reduced, secure gaps between different glue layers are removed, and the frame width is further reduced.