Abstract: Cretaceous conglomerate and mudstone universally exist in Changchun district,but conglomerate is difficult for sample drilling to do laboratory tests; mudstone is affected by many factors such as water stability,expansibility and slaking; many parameters,such as bearing capacity value,shear test parameter,permeability coefficient and coefficient of subgrade reaction,confirm mainly by empirical data evaluation method,There has a big difference on parameter rationality and accuracy.The article proposed bearing capacity values,shear strength,parameters,permeability and in-situ coefficient of subgrade reaction and so on by in-situ plate loading test,water immersion loading test and in-situ shear test on mudstone and conglomerate of cretaceous strata in Changchun district,,providing a geological reference for subway design and construction.