Abstract: In order to analyze suitable meteorological conditions for Platycodon grandiflorus in Youyang county，Chongqing city，and effects of meteorological conditions on reproductive status of Platycodon grandiflorus，Platycodon grandiflorus was planted at different altitude areas and same planting pattern，comparative observation experiments of whole growth period of Platycodon grandiflorus were carried out，effects of meteorological conditions on growth period of Platycodon grandiflorus were analyzed，climatic regionalization of Platycodon grandiflorus planting in Youyang county was made in order to explore the best planting area for Platycodon grandiflorus.