The invention relates to a rectification type dust collector, which comprises a dust remover. A plurality of dust removal rollers are fixedly connected to the inner top end of the dust remover. A plurality of moving mechanisms are fixedly connected to the side wall of the dust remover. Supporting plates are fixedly connected to the side walls of the multiple moving mechanisms. The upper ends of the multiple supporting plates are fixedly connected with power mechanisms. Connecting mechanisms are fixedly connected to the upper ends of the multiple supporting plates. Cleaning rollers are rotationally connected to the upper ends of the multiple supporting plates. The left ends and the right ends of the connecting mechanisms are connected with the power mechanisms and the cleaning rollers correspondingly. One ends of the cleaning rollers are movably connected with the supporting plates. Through the quota use of the moving mechanisms, the power mechanisms and the connecting mechanisms, the cleaning rollers can freely move between two dust removal rollers, so that the dust removal rollers are cleaned by the cleaning rollers. The replacement of the dust removal rollers is avoided. The dustremoval rollers can be regularly cleaned, and the resource waste is saved to a certain degree.