Yi Seed Ji Inter fixing devices comprising:One implanting portionThe one resistance portions BlockOne implanting portions what The fixed part , Qi Department and The hinder Block Bu Zhong Inter, and wherein the nearly implanting portions the The Office of The fixed parts contains a spiro tooth part, and to screw in Two phase O Ji Tu Inter, nearly The resistances Block Bu Office The contain a recessed portion, to accommodate upper aristate process and lower spinous process to be fixed.一種棘間固定裝置,其包括:一植入部;一阻擋部;一固定部,其係位於該植入部和該阻擋部中間,其中該固定部近該植入部處含一螺牙部,用以旋入兩相鄰棘突間,近該阻擋部處則含一凹陷部,用以容置待固定的上棘突和下棘突。