In order to investigate the fire spread and temperature field of external wall insulation material in high-rise building

the numerical simulation model of a 20-story reinforced concrete residential building was made by Fire Dynamic Simulator（FDS）.Bamboo scaffold and nylon safety net were included in the model.The fire originated on the outside wall of the second floor.The laws of fire spreading

temperature field and carbon monoxide distributions were obtained.The results show that the fire spread in horizontal direction then in vertical direction.In a short time

fire spreads the whole surface

namely skin burning phenomena.After window glasses breaking

the combustibles of compartment were ignited and three-dimensional combustion was occurred.Chimney effect rises in the slots of the building

the highest temperature at 1000℃appeared in these slots.There are two peak temperatures in the whole fire process.The results are valuable for fire precaution measures of outdoor fire in high-rise building with external wall insulation.