Abstract: Geotechnical physical and mechanical parameters are particularly important in the design and construction of civil engineering. They are not only related to the quality and safety of Engineering construction, but also closely related to the selection of structural design, cost and progress of engineering. In order to fully apply these precious data to engineering construction, In this paper, I sorted the data of physical and mechanical parameters of three types of rocks recorded in the Handbook of Rock Mechanics Parameters and analyzed the correlation between the five indexs of rock(the dry compressive strength, the wet compressive strength, bulk density, water absorption, elastic modulus) by means of mathematical statistics. The results show that:1)The dry and wet compressive strength, modulus of elasticity and bulk density of rockobey normal distribution; however, the water absorption index of rock does not obey normal distribution; 2)There is a strong linear relationship between dry and wet compressive strength of rock; 3)The compressive strength of rock is positively correlated with its elastic modulus and bulk density but negatively correlated with its water absorption. Finally, according to the statistical results, the empirical formulas among the strongly correlated parameters are established, which can provide references for geotechnical engineering construction.