Commercial vehicle and storage box thereof

The utility model provides a commercial vehicle and a storage box thereof. The storage box comprises a box body, a fixed partition plate and a movable partition plate. Wherein a containing cavity is formed in the box body, and the fixed partition plate is installed in the containing cavity and divides the containing cavity into at least two first cavity bodies; the movable partition plate is located in the first cavity and detachably installed on the fixed partition plate, the movable partition plate divides the first cavity into at least two second cavities, and the second cavities are used for containing stored objects. Therefore, the space size of the second cavity can be adjusted by increasing or reducing the number of the movable partition plates or moving the mounting positions of the movable partition plates on the fixed partition plate, so that articles cannot move in the storage box, the articles can be better stored, and the problems that in the prior art, a storage box of a commercial vehicle is si