Abstract: For the current situation that the application of risk matrix method may result in too many risk ties which will block risk management and decision making, and based on the brief introduction of risk matrix method, this paper subdivides the risk levels, gives an improved risk matrix method, conducts risk assessment of contractor support using the improved risk matrix method, and determines the risk rates and the acceptable level.

Key words: risk matrix| contractor support| risk assessment

摘要： For the current situation that the application of risk matrix method may result in too many risk ties which will block risk management and decision making, and based on the brief introduction of risk matrix method, this paper subdivides the risk levels, gives an improved risk matrix method, conducts risk assessment of contractor support using the improved risk matrix method, and determines the risk rates and the acceptable level.

关键词: risk matrix| contractor support| risk assessment