The burning spectrums of Mg/Ba(NO3)2 compositions are measured with the whole-band radiometer in a state of static and airflow in order to analyze the distribution of burning spectrums in the airflow. The burning spectrum distribution figures of pyrotechnic compositions are obtained. The main energy radiation spectrums of Mg/Ba(NO3)2 compositions in a state of static and air flow are in the range of 620～760 nm, and the position of the strong radiation peak is same. The combustion time of Mg/Ba(NO3)2 compositions is 14.20 s in a state of static, the wall temperature is 1 298.23 ℃, and the combustion time is 8.63 s in a state of airflow, the wall temperature is 593.36 ℃. In a state of airflow, the Mg/Ba(NO3)2 compositions are mainly dissipated in the form of forced convective heat transfer, and heat dissipation is mainly in the form of radiation in a state of static.