Abstract: Based on the plate loading tests, the concept and physical significance of the coefficient of soil reaction, modulus of deformation and dynamic modulus of deformation as well as the test principle are introduced combining with the test method. Taking D-P model as the example, seven groups of values of the coefficient of soil reaction, modulus of deformation and dynamic modulus of deformation are calculated. The linear representations and coefficients of linear correlation of modulus of deformation and coefficient of soil reaction, dynamic modulus of deformation and coefficient of soil reaction are acquired. The results indicate that they have a high level of linear correlation, and their expressions are closely to the actual situation.