The invention discloses a multi-stage glass cleaning device. The device comprises a conveying mechanism, a cleaning mechanism, a rotating mechanism and a drying mechanism; the conveying face of the conveying mechanism is of a conveying belt form, and to-be-cleaned glass is conveyed from one end of the conveying face to the other end of the conveying face; the cleaning mechanism is arranged into two spaced sections, the two spaced sections are arranged on the front half portion and the rear half portion of the conveying route of the conveying mechanism correspondingly, and the glass on the conveying face of the conveying mechanism can be cleaned through the cleaning mechanism; the rotating mechanism is arranged between the two sections of cleaning mechanism and used for reversing the glass cleaned by the front section of the cleaning mechanism, so that the glass is conveyed to the rear section of the cleaning mechanism and subjected to cleaning; and the drying mechanism is arranged at the terminal end of the conveying face of the conveying mechanism and used for drying the glass cleaned by the cleaning mechanism. The multi-stage glass cleaning device is simple and reasonable in structure, and the purpose that double-face cleaning can be conducted on same conveying belt is achieved by installing the two cleaning sections and a glass reversing device between the two cleaning sections.