Abstract: The rock physico-mechanical indices are important parameters reflecting the engineering properties. The uniaxial compressive strength σ_c, elastic modulus E, Poisson's ratio μ, rock block density ρ and longitu dinal wave velocity V_pof Cretaceous sandstone, Triassic siltstone, Triassic thin marl, Triassic silty mudstone, Devonian quartz sandstone and Triassic, Permian, Ordovician limestone in typical landslide area of Enshi county western Hubei province were chosen as objects of analysis. Through the cluster and correlation analysis of the above representative test parameters, the results indicate that Cretaceous sandstone and Triassic siltstone, Triassic silty mudstone and Permian limestone have the same associated model of parameters. The rock density is connected with P-wave velocity tightly, so their product can be used as a combination parameter to improve the parameters correlation equations fitting precision. Every strata rock parameters correlation equation is obtained respectively. The equations can consider more factors and have a concise form. The normality testing results of fit residuals show that the fitted parameters correlation equations are reasonable.