The invention provides a packaging device for liquid crystal panel, including: first main body, further including bottom, and a plurality of side walls connected to sides of bottom, wherein side wall forming an opening; second main body, further including bottom and a plurality of side walls connected to sides of bottom, wherein side walls forming an opening; wherein opening of second main body slightly smaller than opening of first main body, and facing towards opening of first main body; second main body able to move adjustably into first main body; bottom and side walls of first and second main bodies forming loading space for loading liquid crystal panel. The packaging device can be expanded when in use for loading large-sized panels, and size of packaging device can be reduced when idled or recycled to enhance efficiency.