Abstract：The criteria for evaluation of compaction quality and the mechanical properties of over coarse-grained soil are not clearly. These problems hindered its farther project application. At present，test section method is often adopted to determine parameters of important filling construction and well effect is obtained. In order to adapt the needs of project development，the compaction mechanism and the influence of different construction technological parameters such as grain composition，water content，construction machinery，filling thickness and compaction times etc. are discussed by the field roller compaction test depending on a embankment project of S325 highway in Henan Province. On the basis of the test，the optimal technological parameters and quality control specification of the given project are found by contrast tests for which various detection methods such as compaction settlement，watering method and flexure are adopted. And field compaction quality control method of over coarse-grained soil is put forward，namely，differential settlement is given priority but construction technological parameters must be considered at the same time. The method may insure filling quality effectively and quicken construction progress. And it also can provide scientific data，standards for the quality control，quality check，quality evaluation of the projects for which over coarse-grained soil is adopted as filling material. It has significant applicable value.
