Abstract: When the content of coarse grains increases,it will lead to three different structure types of wide grading gravelly soil,showing different compaction properties.After the extra large coarse grains were excluded with the equivalent replacement method,the heavy compaction tests on wide grading gravelly soils with different gravel contents were performed,the compaction properties of wide grading gravelly soil with different contents of coarse material or different structures were studied,and the breaking of grain was analyzed.It was shown that the maximum dry density of wide grading gravelly soil increased first,and then decreased,with the increasing of gravel contents or contents of coarse material,however,the content of broken grain remained increasing.