The invention relates to a modeling device and a method thereof for a stalk of a flower. The flower planted on a pot body includes a stalk and an upper flower part located on the stalk, in which the stalk can be formed of a curved style by growing in the modeling device. The modeling device includes a fixed rod and a draping free-bending rail, in which the fixed rod is insertedly positioned on the pot body, and the free-bending rail having a trackway is at least configured with a bottom-end inlet port and a top-end outlet port and juxtaposed to the fixed rod. The fixed rod is configured with a bent modeling section that is arranged between the inlet port and the outlet port of the free-bending rail. With the bent modeling section of the fixed rod, the free-bending rail can be guided to form a corresponding bent shaping section. Accordingly, the stalk of the flower can have a corresponding shape as the flower grows upwardly along the trackway of the free-bending rail, thus to promote viewing value of flower decoration.一種花卉花梗造型裝置及其方法,其植設於盆體之花卉含有花梗及其上端花部,並且花梗沿著一造型裝置內生長塑型出彎曲造型;造型裝置包含有一插置定位於盆體上之固定桿;以及一含有軌道之懸垂性自由彎曲軌,其至少設有一底端引入口及一頂端引出口;該固定桿與自由彎曲軌彼此相鄰併列,固定桿於引入口及引出口之間設有彎曲造型段,以引導自由彎曲軌形成對應彎曲塑型段,使花梗沿著自由彎曲軌之軌道朝上生長對應塑型,以提高花卉裝飾觀賞價值。2...固定桿21...彎曲造型段3...自由彎曲軌31...彎曲塑型段32...軌道33...引入口34...引出口