Car combustion experiment was conducted by selecting 3 cars, medium sedan, large sedan and van, for modeling of heat release rate(HRR) on car fire at parking space. Lists of measurement are internal and external temperature, HRR, mass decrement, and according to the result of experiment, it is considered that it requires review of fire resisting capacity of structure by temperature characteristic of internal and external temperature, and location of parking space structure. as a result review of fire resistance is needed. Also, Total HRR, burning speed, and heat of combustion of car were secured, and modeling of HRR for each car classification was written by using HRR. As a result, error range of total calorific value between experimental value and model value was within 10%, and it proposed combustion characteristic DB by car classification for fire resistance design of parking space structure.