Coupling simulation method between flame flux and thermal response of structure was discussed using computation fluid dynamics (CFD) simulation software and parallel technique, with cylinder steel structure as object, using numerical method of discrete and derivation in all domain. Thermal response of package in three-meter diameter pool fire under stagnant air and cross-wind was simulated. The regularity of temperature and heat flow response on horizontal setting container in stagnant air and cross-wind was obtained. The results can provide thermal-mechanics coupling simulation of the structure including dangerous goods with load boundary condition, thereby providing a theoretical reference for security assessment of the structure including dangerous goods.