In order to improve the gun barrel’s ablation resistance properties, extend the gun barrel’s life, improve the precision of artillery, and research the problem of erosion and wear of gun barrel effectively. Summarized the domestic and foreign measures of extending the gun barrel’s life, analyzed and compared the analysis method for calculating the gun barrel’s erosion and wear (experience formula method, wall temperature estimation method, thermochemical ablation model). The research provides reference for relevant personnel in understanding the extension of gun barrel’s life.