Abstract: Geological disasters, influenced by natural and human factors, directly threaten the safety of people’s lives and property. Exploring the spatiotemporal variations and development mechanisms of geological disaster risk can enhance disaster prevention and mitigation. This study examined 31 factors such as topography, rainfall, and social economy from the perspectives of nature and humanity. Based on the four-factor risk theory, this study investigated the variations of geological disaster risk in the western Sichuan region using methods like the analytic hierarchy process, principal component analysis, information value model, entropy weight method, and hot/cold spot analysis. Employing the obstacle degree model, this study explored the degrees of influence of various factors on geological disaster risk in the western Sichuan region. The results indicate that from 2007 to 2022, the geological disaster risk in the western Sichuan region was generally characterized by higher levels in the west and lower levels in the east. Kangding and Maerkang were the concentrated distribution areas of perennial cold spots. The area of extremely low and low risk levels increased by 8 871.1 km² and 12 478.6 km² respectively at growth rates of 1.056%/a and 1.485%/a respectively. The area of high and extremely high risk levels decreased by 10 127.8 km² and 9 880.1 km² respectively at growth rates of -0.02484 km²/a. The degrees of influence of various factors on risk levels exhibited temporal heterogeneity. The dominant obstacle factors (obstacle degree: above 5 %) were concentrated in risk and disaster prevention and mitigation indicators. Factors including rainfall, topography, and medical resources contributed significantly to geological disaster risk.