With the rapid development of industry in China

the number of establishments which are proposed or under construction is increasing year by year

and many are related to flammable

explosive

toxic

harmful and dangerous substances.Accidents such as fire

explosion and toxic diffusion are inevitable to happen.Once the accidents that were caused by the major hazard in cities happened

they will cause a large number of casualties and property lossess.At present

the theoretical study of risk analysis in chemical industry area is still in its infancy in China.A method for risk analysis of major accidents in chemical industry areas was proposed from an overall point of view in this paper

and had an example of application. The multi-hazard installations in the area were assessed comprehensively.Risk of various major accidents were considered together

the superposition effect was analyzed

individual risk contours were drawn out. Then the level of risk in the chemical industry areas was assessed using ALARP（as low as reasonable practicable） guidelines.According to the results

recommendations of security planning

risk control and emergency response were given out for the area.The proposed method has a certain practical and theoretical significance to establish and improve the risk analysis of chemical industry area.