Soil-rock　mixture　is　significantly　different　from　soil　and　rock　in　structure,　mechanical　properties　and　deformation　behavior.　Considering　the　mesoscopic　structure　of　soil-rock　mixture　which　can　be　treated　as　a　two-phase　composite　of　rock　blocks　and　soil,　a　mesoscopic　equivalent　analysis　method　for　studying　the　macro-mechanical　properties　of　soil-rock　mixture　is　proposed.　Two　key　problems　of　the　method,　mainly　about　the　rock　size　threshold　and　equivalent　method　of　soil-rock　mixture,　are　discussed.　Firstly,　homogenization　process　is　conducted　on　the　＇small＇　stones　and　soil　to　obtain　the　equivalent　homogeneous　isotropic　matrix.　Then　the　new　soil-rock　mixture　is　formed　by　placing　the　＇big＇　stones　in　the　equivalent　matrix,　and　its　mechanical　behavior　and　deformation　feature　are　analyzed　using　numerical　approaches.　Based　on　the　method,　consolidated　drained　triaxial　tests　of　soil-rock　mixture　are　simulated.　The　analysis　shows　that　the　results　obtained　by　the　mesoscopic　equivalent　analysis　method　are　in　good　agreement　with　those　obtained　by　the　tests,　thus　proves　the　efficiency　of　the　method.　©　2017,　Engineering　Mechanics　Press.　All　right　reserved.