The invention discloses a deviation correcting device for a guiding belt of a cloth drying machine. The deviation correcting device comprises two deviation correcting mechanisms which are symmetrically arranged on the two sides of the guiding belt, and each deviation correcting mechanism comprises a clamping unit and a pulling unit; each clamping unit comprises an upper clamping plate, a lower clamping plate, an upper rotating screw, a lower rotating screw, an upper rotating gear, a lower rotating gear, a driving motor and a base plate, wherein the upper clamping plate and the lower clamping plate are located above and below the edge of the guiding belt respectively, the upper rotating screw and the lower rotating screw are vertically connected to the upper clamping plate and the lower clamping plate in a screwed mode respectively, the upper rotating gear and the lower rotating gear are fixedly arranged on the upper rotating screw and the lower rotating screw in a sleeving mode respectively and meshed with each other, and an output shaft of the driving motor is fixedly connected with the lower end of the upper rotating screw; each pulling unit comprises a long-strip-shaped rack part formed on the upper end face of the base plate, a gear meshed with the rack part and a motor used for driving the gear to rotate. According to the device, the deviated guiding belt can be pulled to a correct operating track, and normal conveying of the guiding belt cannot be influenced.