Abstract：By Brazilian tension tests of complete procedure for Three Gorges granite conducted by a servo-controlled testing machine，it is found that there exists obvious linear relationship between load and displacement of load point before breakage. It is believed that the relationship demonstrates the elastic character of rock and therefore the elastic modulus of rock can be estimated from the complete load-displacement curve. The splitting modulus in Brazilian tension test has been defined. Based on large quantity of Brazilian tension tests and uniaxial compression tests，the ratio of elastic modulus to splitting modulus of the Three Gorges granite is estimated as 19.2. Finally，the proportional relationship between load and displacement of load point is numerically simulated by 3D FEM. It is pointed out that the relationship is also affected by the elastic modulus and geometry of rock specimen.
