Wuhan Metro Line 6 has to go under an existing station of the 2^nd line by the method of in advance tunneling construction. This article describes the construction process in advance of shield tunneling segment through a series of problems existing in the corresponding solutions, and analyzes the track surface during construction on the 2^nd line of settlement and the existing station building subsidence case of using shield empty push impact on the existing tunnel. Based on Wuhan metro Line 6 tunnel, this article carries out a systematic analysis on the early application of the existing tunnel excavation method and the shield push with no-load. On this basis, the article dissusses the shield tunneling segment results from the rail surface setflement of the existing track and station building cumulative settlement. The project also uses a special precipitation and strengthening programs to reduce the impact of the construction process on the existing line operator and provides a useful reference for similar engineering.