Plastic packaging box with changeable inner cavity space

The utility model relates to the technical field of plastic packaging boxes, in particular to a plastic packaging box with a changeable inner cavity space. According to the technical scheme, the novel plastic packaging box mainly aims at solving the problems that the internal space of an existing plastic packaging box is usually fixed and is not convenient to take out and reuse, resource waste is caused, the internal space cannot be changed, and therefore products of different sizes cannot be stored conveniently, and the novel plastic packaging box comprises a box body; partition plates for conveniently dividing the space in the box body into multiple parts are arranged in the box body in an array mode, first adjusting cavities are symmetrically formed in the partition plates, and first limiting mechanisms for conveniently and preliminarily limiting the positions of the partition plates are arranged in the two first adjusting cavities. According to the packaging box, the space pattern in the box body is chang