In　this　paper,　we　study　the　property　of　solutions　to　axially　symmetric　incompressible　MHD　equations　in　three　dimensions.　First,　we　present　the　three-dimensional　axially　symmetric　incompressible　MHD　equations.　We　propose　a　new　one-dimensional　model　that　approximates　the　MHD　equations　along　the　symmetric　axis.　This　one-dimensional　model　can　construct　a　family　of　exact　solutions　to　the　three-dimensional　MHD　equations.　Second,　we　give　a　family　of　particular　solutions　to　the　three-dimensional　and　a　prior　estimates　of　one-dimensional　MHD　equations.　Finally,　we　construct　a　family　of　global　smooth　solutions　to　the　three-dimensional　MHD　equations　by　applying　the　one-dimensional　solutions.