The gravel soil red clay was used to in resilient modulus test under the condition of different initial dry density and the the resilient modulus variation was studied. The prediction model of resilient modulus was established. The test results show that:(1) With the same gravel soil content, when the initial dry density increases,the resilient modulus of red clay increases. When the initial dry density increases from low to maximum dry density, resilient modulus grow faster and when the initial dry density increased after exceeding the maximum dry density, esilient modulus grow slower; (2) With the same initial dry density, when the gravel content increases from 0 to 30%, the growth rate of resilient modulus is lower and when the gravel content continues to grow, the growth rate of resilient modulus is greater;(3) When the initial dry density increases from 1.6 g·cm^-3 to 2.0 g·cm^-3, resilient modulus growth values gradually increases with increasing content of gravel soil;(4) The prediction model of resilient modulus was established the and the accuracy of the prediction model was, verified.