Abstract: Mudstone, shale and sandstone contaminated with heavy metals are studied with shear strength test, endurance strength test, resistant to disintegration test and point loading test. According to the results, the relationship curves of compressive strength and heavy metal content are drawn. The relationship between compressive strength of the rock and mass ratio of heavy metals is analyzed with linear regression method. The results show that the mechanical strength of the three contaminated rocks decreases with the increasing of heavy metal content under the same conditions such as lithology, water content, and test condition. The relationship between uniaxial compressive strength and mass ratio of heavy metals is a logarithmic function for contaminated mudstone and sandstone and power function for contaminated shale. The differentiation of relationship is a more significant or significant negative correlation. The equations of intrusion and extension performances are established according Weibull distribution law and convection-diffusion characteristic. The test results of mudstone are calculated. The curves between intrusive performance, extended performance and time are drawn. The results show that the average order of intrusive performance and extended performance of four metal elements in shale is Cd2+ Pb2+ Cu2+ Zn2+. The element activity is greater, the invasive capacity and extended capacity are stronger. The intrusion performance gradually decreases and the extended performance gradually increases with changing time.