Houttuynia cordata Thunb is an important medicinal and edible plant widely distributed in East Asia. To understand the potential distribution characteristics of H. cordata and its response to future climatic change, the Maxent model is used to simulate potential distribution under current climatic condition, and predict changes in its distribution under three different future climate scenarios, and analyze the dominant factors affecting its distribution. The results showed that the suitable habitat area of H. cordata at present is 177.45 × 10⁴ km², among which the high suitable area is 26.66 × 10⁴ km², mainly distributed in Guizhou, eastern Sichuan, northwest Guangxi and Chongqing, west Hunan and southeast Hubei. The current distribution of H. cordata is mainly affected by the annual precipitation (bio12, 57.4% contribution rate), min. Temperature of coldest month (bio6, 26% contribution rate) and standard deviation of temperature seasonality (bio4, 6.1% contribution rate), and its total contribution rate is 89.5%. The suitable regional area of H. cordata showed an increasing trend under three climate change scenarios (SSP1-2.6, SSP2-4.5, SSP5-8.5) in both the 2050s and 2070s, and its suitable distribution area extended to the north as a whole. The simulation results are helpful to understand the geoecological characteristics of H. cordata, and provide a basis for the regional prediction of this species under current and future climate change scenarios in China.

鱼腥草是一种重要的药用和食用植物，广泛分布于东亚。为了了解冬虫夏草的潜在分布特征及其对未来气候变化的响应，Maxent模型用于模拟当前气候条件下的潜在分布，并预测三种不同未来气候情景下其分布的变化，并分析主导因素影响其分布。结果表明的合适的生境面积鱼腥草目前是177.45×10 ⁴ 公里²，其中高合适面积是26.66×10 ⁴ 公里²，主要分布在贵州，四川东部，广西北部和重庆，湖南西部和湖北东南。目前经销鱼腥草主要受全年降水量（贡献率bio12，57.4％），分钟。最冷月份的温度（bio6，贡献率为26％）和温度季节性标准偏差（bio4，贡献率为6.1％），其总贡献率为89.5％。的适宜区域面积鱼腥草显示下的21世纪50年代和21世纪70年代既有立体气候变化情景（SSP1-2.6，SSP2-4.5，SSP5-8.5）增加的趋势，其适生区延伸到北部的全过程。模拟结果有助于了解脐带血吸虫的地球生态特征。，并为在当前和将来的气候变化情景下对该物种的区域预测提供依据。