This　paper　presents　an　overview　on　the　multi-field　coupling　model　including　chemical　effects　and　its　applications　in　various　porous　media　which　is　widely　distributed　in　nature.　Basic　theoretical　frameworks　of　coupled　multi-field　problem　are　discussed　in　detail.　Based　on　phenomenological　Biot　theory　and　thermodynamics,　a　general　thermo-electro-chemo-mechanical　coupling　theory　is　presented　and　simplified　version　for　chemo-mechanical　coupled　problem　is　then　derived　on　that　basis.　Using　the　governing　equations　and　constitutive　laws　of　the　theoretical　model,　a　variational　principle　is　deduced　for　a　linearly　coupled　system　and　its　closeness　is　proved.　Several　numerical　examples　are　considered　to　illustrate　the　chemo-mechanical　coupling　phenomena　of　porous　media　and　to　verify　the　variational　theory　and　numerical　procedure　presented.　Finally,　some　problems　and　challenges　in　multi-field　coupling　problems　in　porous　media　especially　in　living　biological　soft　tissue　are　analyzed,　and　future　trends　in　this　field　are　identified.