On　the　basis　of　explicitly　given　the　definition　of　chemical　loading　and　token　variables,　considering　combined　action　of　mechanical　loading,　the　consolidation　deformation　of　the　soil　is　divided　into　mechanical　consolidation　deformation　caused　by　mechanical　loading　and　chemical-osmotic　consolidation　deformation　induced　by　chemical　loading.　A　calculation　method　for　soil　deformation　considering　chemo-mechanical　coupling　behavior　is　proposed.　On　the　micro　level,　the　mechanism　of　soil　deformation　under　double　load　is　analyzed.　The　calculation　formula　of　volume　change　of　macro　pore　is　derived.　According　to　permeability　experimental　results,　quantitative　analysis　on　the　consolidation　deformation　of　soil　is　carried　out　under　the　action　of　combined　loads.　The　results　show　that　the　existence　of　chemicals　can　cause　consolidation　deformation　of　the　soil,　nevertheless,　macro　pore　volume　of　soil　does　not　have　to　be　reduced.　Due　to　desorption　of　adsorbed　water　to　the　macro　pore　space,　soil　macro　pore　channel　may　be　widened　and　void　ratio　may　be　increased.　©　2016,　Editorial　Department　of　Journal　of　Southeast　University.　All　right　reserved.