The invention provides a warp printing module oriented to a sizing machine. The warp printing module can be rapidly installed between a sizing machine slurry groove and a drying chamber, and synchronous production of sizing and warp printing can be achieved. The warp printing module comprises a rack, a printing assembly, a supporting roller, two movable bases, two lifting air cylinders, a drive chain wheel, a driven chain wheel, a cleaning device and a dye recovery groove. The printing assembly is installed on the left movable base and the right movable base. The two movable bases are arranged above the left side and the right side of the rack correspondingly. Each movable base is connected with the rack through a hinge at the rear end, and the front end of each movable base is connected with an acting arm of one lifting air cylinder. The supporting roller is located under a printing round net. The driven chain wheel is fixedly arranged on one side of a supporting roller shaft, and the drive chain wheel is installed on the corresponding side of a sizing roller shaft of the sizing machine, is of a Haff-shaped structure and is provided with two fastening screws. The cleaning device is arranged below the front side of the supporting roller.