Unsafe acts of human in aviation accidents were analyzed systemically.The errors were classified into sense and perceptual errors,memory error,decision-making error and skill error.Violation were classified into routine and exceptional violation.The dimensions for human factor intervention were organization and management,human/team,technology,task and the environment.After preliminary recommendations were made to various unsafe acts,they were necessary to be assessed comprehensively and chosen in accordance with the feasibility,acceptability,cost and effectiveness.Practical study showed that human factors intervention matrix provides an effective tool for developing the proposed safety recommendations and the frame on aviation accident investigation has excellent adaptability.