Allium wallichii Kunth., mainly distributed in the Hengduan Mountain (HDM), was researched in this study. Based on the MaxEnt and ArcGIS, we simulated the distribution trends of A. wallichii in the Last Glacial Maximum, MidHolocene, Current and Future. In addition, we detected the distribution pattern of which A. wallichii responded to climate change following the Last Glacial Maximum. The results indicated that: (1) environmental parameters such as Precipitation of Warmest Quarter, Temperature Annual Range, Temperature Seasonality and Altitude largely influenced the distribution of A. wallichii. (2) Evaluation by ROC curve showed that MaxEnt could accurately predict the species distribution (AUC=0.98). (3) According to the distribution change in all periods, we revealed that the distribution of A. wallichii in the Last Glacial Maximum was expanded compared with the distribution of Current, which is similar to some subnival plants. It can be inferred that the distributions of A. wallichii will move westward in the future.