Abstract: The rock mass physical and mechanical parameters, which are necessary to evaluate the rock mass integrity and strengthen the scarp rock mass of big Buddha, are obtained with elastic wave test method. Analyzing the integrity parameter of Kv, it is discovered that the value of the integrity index of rock mass Kv is bigger than 1 in some part of the terranes. This paper discusses the reason and puts forward the referenced advices for forward correcting the formula of the Integrity index of rock mass.