Abstract: Static elasticity moduli of Tianwan Nuclear Power Plant's foundation rockmass were measured by field borehole elasticmodulus tests and blab conventional tests respectivly. The principle of borebole elastic modulus measurement and test results are presented. Through comparative study,two conclusions are as follows:(1) The influence of the degree of fissure development on field test results is relatively large;(2) The results obtained by abovementioned two methods are elementarily agreeable for integrated rock.