Steel plate bending machine of box type semitrailer

The utility model relates to the technical field of steel plate bending of a box-type semitrailer, in particular to a steel plate bending machine of the box-type semitrailer, which is provided with a cleaning mechanism and a dust collection mechanism, so that impurities on materials can be cleaned in a steel plate bending process of the box-type semitrailer, and the steel plate bending machine of the box-type semitrailer is convenient to use. Dust generated by cleaning can be absorbed, so that the processing quality is improved; comprising a bending mechanism; the device further comprises a lifting mechanism, two conveying mechanisms, a cleaning mechanism, a dust collection mechanism and a filtering mechanism, the lifting mechanism is installed at the upper end of the bending mechanism, the two conveying mechanisms are installed on the lifting mechanism, the cleaning mechanism is installed on the bending mechanism, the dust collection mechanism is installed at the upper end of the bending mechanism, and the f