The utility model discloses a detachable pallet box, which comprises an undercarriage, two lateral walls and two end walls. The lateral walls are detachably arranged above the lateral edge of the undercarriage, and the end walls are detachably disposed above the end edge of the undercarriage. The two lateral edges of the end wall are respectively provided with at least one projection. The lateral wall is provided with two upright posts, and each upright post is provided with at least one matching hole used to match with at least one projection. Four corners of the undercarriage are respectively provided with a corner post, containing spaces for the upright posts of the lateral walls are arranged on the corner posts, and the containing space is internally provided with a support structure for supporting the upright posts of the lateral walls. The end walls and the lateral walls of the pallet box can be assembled together to install on the undercarriage or to detach from the undercarriage integrally, which is convenient for operation, high in reliability and convenient in fabrication.