For eliminating casting explosive shrinkage, research on related technique of internal and external temperature field during casting explosive solidification. Separately carry out experiment and result analysis for casting explosive solicitation process of common injection loading, feeder funnel injecting and hot mandrel. Detect shell external temperature to predicate internal temperature and realize quality predication for shell internal charging, acquire the temperature change rule which making influence on casting explosive solidification process. The results show that the shell internal temperature is higher when time increases, the charging external temperature decreases when internal center temperature decreases. The change is linear change.