Abstract: Based on the historical drought statistical data of Heqing Hydrological Station in Dali Prefecture of Yunnan Province, monthly average flow data during typical drought years, water intake flow data below the cross-section of Heqing Hydrological Station, and ecological flow analysis results, the typical drought year method and water volume superposition method were used to comprehensively analyze and determine the drought warning flow rate of Heqing Hydrological Station as 2.36 m³/s, with a corresponding water level of 2181.80 m. Due to the low water level of Heqing Hydrological Station being affected by downstream water intake dam blockage, drought warning flow warning is mainly used, and the drought warning water level is adjusted in a timely manner based on measured flow data. The research results have certain practical reference value for the development of drought in Heqing County, regional domestic, ecological and industrial safety, as well as regional drought resistance work.