The utility model relates to the technical field of framework cars, in particular to a detachable framework structure of a modularized exhibition car, which comprises a lower cross beam, lower main beams are respectively arranged at two ends of the lower cross beam, and a closed area is enclosed by the lower cross beam and the lower main beams. Stand columns are arranged on the upper portions of the two ends of the lower main beam respectively, an upper main beam is arranged at the upper ends of the stand columns, an upper cross beam is arranged between the two ends of the upper main beam, first reinforcing beams are symmetrically arranged between the lower main beam and the upper main beam, an X reinforcing beam is arranged between the lower cross beam and the upper cross beam, and a short beam is arranged on one side of the lower cross beam. An oblique beam is arranged on the upper portion of one end of the short beam, a trapezoidal beam is arranged on one side of the upper end of the oblique beam, and identical first reinforcing beams are arranged at the two ends of the trapezoidal beam. The main beams, the cross beams and the stand columns are arranged, so that the vehicle body forms a rectangular framework.