Using tree-width data of Sabina squamata in Milyaluo, Western Sichuan of China, the authors’ objectives are to determine the main climate responses in diameter growth and seek to understand the regional climate variability within this ecological complex area. This reconstruction will improve coverage and length of paleoclimatic data for Western Sichuan Province, and contribute to the fundamental information on large-scale climate variability of this remote region with short-term instrumental data.