Landscape is key to protecting the ecological environment. Considering the destructive influence of earthquakes on landscape pattern, it is of great significance to simulate changes in landscape pattern after earthquake action to determine the vulnerability of landscape design. This paper presents research on the change in landscape pattern before and after an earthquake. Studying the Dujiangyan area of Sichuan Province, China, based on remote sensing image, ArcGIS software, and Fragstats landscape calculation software, and indexing landscape unit characteristics and landscape pattern, we analyzed the changes in landscape pattern before and after earthquakes in this area from 2007 to 2008. The study can provide a reference for post-earthquake reconstruction and future landscape regulation in the Dujiangyan area.