With　the　rapid　development　of　smart　grid,　the　lack　of　a　very　accurate　and　consistent　grid　model　has　become　a　bottleneck　for　its　development.　However,　the　traditional　maintenance　and　sharing　methods　for　grid　model　can　not　meet　the　requirements　of　the　current　grid　environment　since　it　is　centralized　and　once　the　central　server　is　attacked,　huge　loss　will　be　caused.　To　this　end,　this　paper　proposes　a　blockchain-based　architecture　for　province-prefecture　power　dispatching　system　to　realize　secure　and　transparent　cross-regional　model　parameters　updating　and　sharing,　which　can　ensure　the　integrity,　consistency　and　traceability　of　the　grid　model　applied　in　each　local　dispatching　center.　In　this　paper,　the　blockchain　technology　is　used　to　store,　update　and　share　model　parameters　in　a　secure　way,　and　different　clients　have　different　permissions　to　access　the　blockchain　network.　The　implementation　of　the　proposed　approach　shows　that　it　is　a　feasible　and　promising　solution　for　smart　grid　model　communication　in　a　secure　way.　©　2021　IEEE.