Battlefield damage analytical technique of rocket cargo projectile is studied to meet future battlefield technical support demand of rocket cargo projectile and improve battlefield technical support ability. Battlefield damage analysis of rocket cargo projectile has been carried out by means of BFIA, DMEA, DTA and DL, which obtains battlefield damage data of rocket cargo projectile. It proves that battlefield damage situation could be calculated with accuracy by this technology, which lays a foundation for battlefield damage assessment of rocket cargo projectile.