The invention belongs to the technical field of carton sheet pushing, and particularly relates to a carton sheet pushing device used in the field of packaging. The carton sheet pushing device comprises a speed reduction motor, a paper storage shell, a guide telescopic plate, a conveying mechanism, a bottom plate, a paper baffle and a paper licking roller. Compared with a traditional carton sheet pushing device, a carton sheet of the traditional carton sheet pushing device is pushed out from the lower side of the paper storage shell; in this way, each time the carton sheet is pushed out, the carton sheet is subjected to gravity applied by alignment of all carton sheets on the upper side, so that resistance of the carton sheet on the lowermost side is increased; a pushing outlet of the designed pushing device is located on the upper side of the paper storage shell; in this way, after the carton sheet is pushed each time, the pushed carton sheet is not affected by other carton sheets, andthe pushing resistance is small; according to the designed pushing device, the pressure of the paper licking roller on the carton sheet is relatively stable each time, and smaller pressure is kept; and the situation that normal movement of the carton sheet is affected since the pressure of the paper licking roller on the carton sheet is too large is avoided.