Abstract: Introducing the study of the stress ratio between pile and soil in a superhighway along the Yangtze River, which has been improved by Dry Jet Mixing pile. The tests for stress ratio between pile and soil of Dry Jet Mixing pile composite foundation, during the bearing experiments and the constructing embankment, are both analyzed. Based on comparing the results of the tests, it is shown that two results are accordant. The final result shows it is feasible for making the stress ratio between pile and soil under the bearing test as the design parameter of the DJM pile composite foundation.