To explore the best harvest time of Clematis mandshurica Rupr., A HPLC method was established to determine oleanolic acid contents from Clematis mandshurica Rupr.

• 摘要为探索东北铁线莲最佳采收时期，采用HPLC法测定可用于东北铁线莲药材质量控制的三萜苷元齐墩果酸的含量。