Abstract: The lining’s concrete cracks in the water tunnel of the right-underground power station in the TGP are presented in this paper,the whole process about the construction and maintenance of the concrete in the lining are monitored and the simulation calculation is performed.Moreover,to find out the weakness in the process of construction the field testing is combined with the the simulation anylysis in this article and the conclusions and calculation data are returned in time to improve the quality of construction.Some useful conclusions are obtained as well.