The invention discloses a real-time early-warning method for tunnel boring machine (TBM) tunnel construction. The real-time early-warning method comprises the following steps that S1, dynamic information data of TBM tunnelling are collected, and a TBM project database set is constructed; S2, a TBM tunneling parameter real-time database is established, and real-time data generated when a TBM operates are preserved in real time; and S3, according to the step S1 and the step S2, early warning is conducted on TBM tunnelling, wherein early warning comprises geology early warning, consumable early warning, vulnerable part early warning and significant problem early warning. Information such as the geological condition, detailed information of consumables and the standby quantity of vulnerable parts of each section in a tunnel project body can be effectively grasped in time, the information is fed back to constructors in time, thus the constructors can grasp all aspects of the detailed information well and timely and accurately make prevention or emergency measures, and the real-time early-warning method is an effective way to reduce safety accidents of tunnel construction, improve the work efficiency, and complete construction tasks with the quality and quantity guaranteed.