Lining crack is a reflection of tunnel lining bearing force beyond its strength, the two lining cracking is the common tunnel disease, according to the Tongjin tunnel lining crack section two local incursion clearance, has carried on the analysis, classification of surrounding rock, groundwater and construction factors is the main reason leading to the lining cracking, take the demolition and reconstruction on the regulation failure lining first, strengthening the surrounding rock, to strengthen the monitoring of lining crack volume measurement, the removal of old lining, timely initial support, to ensure the construction safety. Put forward to prevent cracking measures, design a correct judgment of the rock level, the choice of support and lining parameters; construction standardized operation, to ensure the support in place and the strength of lining, nip in the bud.