Abstract: Gas-lift technology is a mature artificial lifting method, which has the characteristics of simple construction and convenient management. The liquid is carried to the ground by injecting high-pressure gas into the well. In actual production, the lifting is often inefficient due to production fluctuation and abnormal working conditions, so it is necessary to establish corresponding technical system. In order to solve the problem, through the analysis of the cause and mechanism, the gas lift fault diagnosis technology and treatment countermeasures are developed. The process parameter evaluation is carried out based on node analysis method, which provides decision-making basis for optimizing the gas lift design. The field application proves that the lifting efficiency has been improved obviously, and it can meet the needs of the reservoir to the maximum extent. Through this technical countermeasure, the working condition of gas-lift well can be completely mastered, which is of great significance to guide gas-lift production.