The　deformation　structures,　such　as　deformation　twins,　dislocations　and　kink　bands,　play　an　important　role　in　the　plasticity　of　magnesium　alloys　during　the　deformation　process.　However,　due　to　the　complexity　of　hcp　structure,　the　deformation　structures　of　the　magnesium　alloys,　especially　the　interactions　between　deformation　structures　are　still　not　well　understood.　Thus,　it　is　of　great　scientific　significance　to　study　the　microstructure　of　magnesium　alloys,　especially　to　characterize　their　structural　characteristics　of　the　interaction　areas,　which　plays　a　significant　role　in　understanding　the　structure　and　performance　relationships　of　magnesium　alloys.　In　this　work,　a　combination　of　TEM　and　SAED　pattern　was　ap-plied　to　study　the　interaction　mechanism　associated　with　different　kinds　of　deformation　structures　in　Mg-Al-Zn　(AZ31)　alloy.　When　the　applied　external　force　is　not　beneficial　for　deformation　twins　and　dislocations,　kink　bands　act　as　a　supplementary　deformation　mode　to　coordinate　the　asymmetry　of　hcp　structure.　According　to　crystallographic　analysis,　it　is　found　that　under　the　action　of　tensile　stress　nearly　lie　on　basal　plane　in　hcp　structures,　the　basal　dislocation　pairs　form　and　move　to　the　opposite　directions,　forming　tension　kink　band　with　the　interface　of　{1012}　plane.　The　angle　between　the　tension　kink　band　interface　and　the　basal　plane　is　about　43　degrees.　The　tension　kink　bands　can　further　contribute　to　the　strength　and　toughness　of　the　material.　These　results　will　open　a　new　insight　into　the　understanding　of　interaction　mechanism　of　deformation　structures　and　greatly　promote　the　development　of　Mg　alloys.