Research conclusions:(1)The regional geological structure of Liangshui tunnel is very complicated，for the weak thin slate，phyllite or carbonaceous phyllite in high stress，large deformation of surrounding rock appears and causes long passages of primary support deformation and lining.(2)Based on the construction experience，combined with the amount of field test section of surrounding rock large data analysis，double the initial support and double lining engineering measures are taken，the initial supporting arch strength is further optimized，which can effectively control the large deformation of tunnel lining.(3)According to high security risk for the demolition of arch construction，the measures with short，quick support, demolition of temporary arch，setting locking anchor pipe and following the rapid tunnel two lining，can further reduce and control the security risk. (4)The treatment measures proposed by this paper are based on the large section double line tunnel of railway through the geological conditions of soft rock deformation and rare condition of failure and deformation of initial support and lining，which has a certain guiding value for the similar tunnel construction.