In order to study the ecological suitability of A. membranaceus var. mongholicus in Inner Mongolia and promote the development and utilization of A. membranaceus var. mongholicus, this paper analyzed the ecological suitability by the combination of MaxEnt and geographic information technology, and selected the dominant ecological factors influencing the ecological suitability of A. membranaceus var. mongholicus and the most suitable living areas were found. The results showed that: eight ecological factors affecting the ecological suitability of A. membranaceus var. mongholicus were standard deviation of temperature seasonality, slope, mean precipitation of October, precipitation seasonality (coefficient of variation), altitude, vegetation type, precipitation of warmest quarter and soil type. The most suitable regions for cultivating A. membranaceus var. mongholicus were the surrounding areas of Tumed Right

Banner of Baotou and the north of Dalat Banner of Erdos. The experimental method was scientific and accurate, which could lay a foundation for the quality division of A. membranaceus var. mongholicus and the location of cultivation base.

Astragalus membranaceus (Fisch.) Bge. var. mongholicus (Bge.) P. K. Hsiao, ecological factors, ecological suitability, maximum entropy model

为了探究内蒙古地区道地药材蒙古黄芪的生态适宜性，促进蒙古黄芪资源的开发利用。采用最大信息熵模型与地理信息技术联用的方法对生态适宜性进行分析，筛选出对蒙古黄芪生态适宜性影响最大的主导生态因子，并找出最适宜蒙古黄芪生长的适生区域。结果表明：影响蒙古黄芪生态适宜性的8个主导生态因子分别是温度季节性变化的标准差、坡度、10月平均降水量、季节降水量变异系数、高程、植被类型、最暖季降水量和土壤类型。最适宜蒙古黄芪种植的区域在包头市土默特右旗以及鄂尔多斯市达拉特旗北部地区。该方法具有良好的科学性和准确性，可为蒙古黄芪品质区划、栽培基地选址等工作奠定研究基础。