On October 11 and November 3, 2018, two major landslides occurred near Baige village, Boluo Township, Jiangda County, Changdu City, Tibet, in the upper reaches of the Jinsha River, blocking the main stream of the Jinsha River and forming a barrier lake, resulting in significant economic losses. Based on this, this paper extracts spectral features based on multispectral remote sensing data, uses spectral change intensity analysis method for information mining, analyzes the temporal and spatial characteristics of deformation movement of Baige landslide, and extracts the regional deformation history and deformation spatial distribution characteristics in the 21-year evolution process of landslide, in order to provide theoretical and technical support for regional landslide monitoring and prevention.