A tunnel lining seamless connection steel bar positioning and waterproof plate laying loop wheel machine comprises a main body framework, a traveling laying mechanism, seamless connection steel bar positioning push-out modules and stretch-out platforms. The traveling laying mechanism is arranged on the main body framework and comprises two annular sliding channels, traveling trolleys, a steel bar inserting pipe and a waterproof plate hanging groove. The two annular sliding channels are arranged on the front end and the rear end of the main body framework correspondingly. The two traveling trolleys are arranged on the annular sliding channels and connected to be a whole through a supporting cross beam. The seamless connection steel bar positioning push-out modules are arranged on the upper portion of the main body framework, and the stretch-out platforms are arranged on the two sides of the seamless connection steel bar positioning push-out modules. According to the tunnel lining seamless connection steel bar positioning and waterproof plate laying loop wheel machine is reasonable in design, simple in structure and convenient to use. The number of steel bars laid at a time is large, steel bar dislocation is prevented, the laying effect of the steel bars and a waterproof plate is good, practicability is high, the working strength can be effectively reduced, and working efficiency is improved.