Shield tail brush device of newly-added shield tunneling machine and installation method

The invention discloses a newly-added shield tail brush device of a shield tunneling machine and an installation method, and aims to solve the problems that in the prior art, a shield tail brush is prone to failure, slurry leakage is serious, and the risk of replacing the shield tail brush is high. According to the shield tail brush device and the installation method, a newly-added positioning ring fixed to the inner wall of a shield body plays a role in positioning, and a clamping assembly fixed between the newly-added positioning ring and the inner wall of the shield body and a tail brush mechanism fixed in the clamping assembly are clamped in a matched mode; the tail brush mechanism comprises a spring plate assembly, a protection plate assembly and a steel wire row brush, wherein the spring plate assembly and the protection plate assembly are installed in a staggered mode, and the steel wire row brush is fixed between the spring plate assembly and the protection plate assembly. The shield tail brush is add