The invention discloses a TBM disk-shaped hobbing cutter additionally provided with reinforcement ribs on the side face of a cutter ring. The cutter ring, a check ring, a cutter body, a bearing end cover, an isolating ring, a shaft, a bearing and a sealing ring are included; the multiple reinforcement ribs are arranged on the side face of the cutter ring which is arranged on the peripheral side ofthe cutter body; the check ring is used for positioning the cutter ring at the position of the cutter body; the bearing is assembled on the shaft and located on the inner side of the cutter body; thebearing end cover is used for sealing the bearing inside; and the isolating ring is used for dividing the bearing; and the sealing ring is used for sealing a gap between the bearing end cover and thecutter body. The structure can be used for effectively reducing abrasion and damage of the hobbing cutter in work, the rock breaking capacity of the hobbing cutter is improved, the reliability and the economical efficiency of the hobbing cutter are improved, the work cost of a tunnel boring machine can be lowered easily, and very high practical value and application prospects are achieved.