Chemo-mechanical　coupling　exists　in　a　lot　of　intelligent　materials　including　hydrogels,　biological　tissues　and　other　soft　materials.　These　materials　are　able　to　respond　to　external　stimulus,　such　as　temperature,　chemical　concentration,　and　pH　value.　In　this　paper,　a　one-dimensional　theoretical　model　for　chemo-mechanical　coupling　is　proposed　for　analyzing　the　uniaxial　stress/strain　state　of　coupling　materials.　Based　on　the　chemo-mechanical　coupled　governing　equation,　the　displacement　function　and　concentration　function　are　derived　and　the　stress　and　chemical　potential　are　obtained.　It　is　shown　that　the　present　chemo-mechanical　theory　can　characterize　the　chemo-mechanical　coupling　behavior　of　intelligent　materials.