The Falling Weight Deflectometer (FWD) test, Portable Falling Weight Deflectometer (PFWD) test and Dynamic Cone Penetrometer (DCP) test in field as well as indoor repeated loading test were carried out with three types of subgrade, clay, sandy and earth-rock mixture. The regression relationship of the parameters observed of these three different types of subgrade in field was investigated respectively. The indoor dynamic modulus changed along with different water contents and the relationship waspresented as well as the empirical relationship of the on-site and indoor dynamic The results indic...