The blasting temperature of Al-HMX composite explosives in enclosed condition was tested by the direct measurement to investigate the response characteristic and rule of the explosive detonation. The results show that the blasting temperature increases with the increasing of Al content. When Al content is in the range of 30%-40%，the blasting temperature is at its maximum (750 ℃), when Al content is 30%, the detonation heat is at its maximum, which indicate that the aluminized explosive reacts completely and the aluminum is used fully in enclosed condition.