Objective Platycodon grandiflorus (Jacq.) A.DC. contains a lot of triterpenoid saponins, volatile oil, flavonoids, polysaccharides and amino acids, which have some effects on the germination and growth of plant seeds.In this experiment, the effect of aqueous extracts from different parts of Platycodon grandiflorus (Jacq.) A.DC. on wheat seed germination was studied by using culture dish filter paper method. In the experiment, different parts of Platycodon grandiflorus (Jacq.) A.DC. were extracted by water, 2 g powder of different parts of Platycodon grandiflorus (Jacq.) A.DC. were extracted by water bath with 100 mL ultra-pure water at 65 °C for 1 h, and mother liquor was obtained, then diluted to the appropriate concentration of extract solution, then we made the medium to culture the wheat seeds, through observing the germination of the wheat seeds on the medium of the blank control group and the water extract of different parts of Platycodon grandiflorus (Jacq.) A.DC., to analyze the effect of aqueous extracts from different parts of Platycodon grandiflorus (Jacq.) A.DC. on the germination of wheat seeds, the germination percentage and germination potential of wheat seeds were measured at different time.The results showed that the aqueous extract from roots and stems of Platycodon grandiflorus (Jacq.) A.DC. had a certain effect on the germination of wheat seeds, and the effect of the aqueous extract from stems was better than that of roots, but at the same concentration, the aqueous extract of leaves of Platycodon grandiflorus (Jacq.) A.DC. showed almost inhibitory effect on wheat seed germination.