Luggage box with detachable part

The present invention relates to a suitcase, in particular to a suitcase with a detachable part, comprising: a suitcase main body having an upper end surface and a lower end surface, at least one of the upper end surface and the lower end surface has a A recessed cavity having at least one assembly hole in the bottom wall of the recessed cavity and a locking device at the upper end of the main body, the luggage case further comprising: a detachable part; a bottom guard; wherein, when the When the detachable portion is placed in the recessed cavity and fixed in place, at least a portion of the detachable portion is confined within an interior space defined by at least the front and bottom stops of the bottom guard, and the at least one protrusion on the lower surface of the bottom stop is fastened in at least one fitting hole; the fastening mechanism at the upper end of the detachable part is releasably fixed to the locking device. The invention can conveniently replace the detachable part based on the needs of the user, so that the use is more convenient and humanized.