In modern warfare,cruise missiles are widely used due to their strong penetration ability,high hit accuracy and low military costs and other advantages.But,the surface-to-air missile weapon sys-tems are greatly affected by the terrain while resisting the cruise missiles launched at low altitudes.When selecting deployment positions,specialized equipment is needed for manual measurement,which is time-consuming and has low accuracy.To this end,a digital geographic information based method for analyzing the interception arc of cruise missiles by surface-to-air missiles is established,and practical examples are used for analysis and verification,achieving better results.This has certain reference significance for the deployment of surface-to-air missile positions and the analysis of resistance effectiveness.