Abstract: The surrounding rocks of the new Moxi No. 2 tunnel, passing through adverse Karst, landslide and gymsum strata, are of grade Ⅳ and Ⅴ soft rock, the geological condition is complex and construction risks are high.Moreover this new tunnel is adjacent to an existing operating railway line and the construction is more difficult and requirement of safety is high, it is hard to meet the requirements of schedule and safety with traditional drill and blast method. Compared with the conventional drill and blast method, the advantages of boom roaheader were analyzed, the matching equipment techniques and construction organization scheme of complete set mechanized operation line of boom roadheader were described. The practice shows that the application prospect of complete set mechanized operation line of boom roadheader used in tunnel construction is bright as an advanced non-drill and blast construction method.