In order to explore the thermal hazard of fireworks, the adiabatic reaction processes of dry and wet white-light fireworks mainly composed of barium nitrate were studied by an accelerating rate calorimeter(ARC).The curves of change in adiabatic reaction temperature with time and in temperature rise rate with temperature were obtained.The pseudo-inverse matrix method was used to calculate the apparent activation energy and pre-exponential factor for the exothermic reaction of two fireworks and the measured data were modified by thermal inertia factor of ARC.The results show that the initial temperature, final temperature, initial self-heating rate, maximum self-heating rate, maximum self-heating rate temperature and time to maximum rate of the exothermic reaction are 567.75 K, 740.48 K, 0.17 K·min^-1, 61.56 K·min^-1, 707.5 K, 145.93 min for dry fireworks and 363.59 K, 1128.8 K, 0.07 K·min^-1, 0.77 K·min^-1, 799.47 K, and 1480.86 min for wet fireworks, respectively, indicating that wet fireworks are easier to reaction, and the reaction rate of dry fireworks is faster than that of wet fireworks.