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The fire extinguishing of super-high building is a difficult problem on the field of fire science and technology.The only method is self-rescue when super-high building fire happens.Therefore,fire risk assessment of super-high building is very important and necessary.The existing assessment index systems only conclude fire risk factors on super-high building interior.However more and more decorative materials are used to improve the shape of the building exterior walls,and these decorative materials often leads to fire.