Abstract: In this paper effects of edible and chemical pigments on dyeing of cut Platycodon gradiflorus were studied. The results showed that Sunset yellow and Amaranth were more suitable for cut Platycodon gradiflorus than Brilliant Blue，Ponceau 4R , Egg Yolk color and Apple Green were not suitable for cut Platycodon gradiflorus. Suitable density and time of different edible pigments were Sunset Yellow(18g/L,6h), Amaranth(15g/L,7h), Brilliant Blue(12g/L,6h), Ponceau 4R(15g/L,6h), Egg Yolk color (18g/L,8h) and Apple Green (18g/L,8h). There are 7 varieties which are effective to cut Platycodon gradiflorus among 20 chemical pigments, the effects of tetra bromophenol blue （6g/L,8h）and Methyl Blueness (5g/L,8h) were better. The dyeing speed was fast when cut Platycodon gradiflorus opened in a great degree. Flower stems with more or less leaves were not significant different. The Vase life became shorter after dyeing but still had a period of 4~6 days for ornament.