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In this paper, the analysis method of STPA is introduced to analyze the flight safety in approach and landing, and the occurrence of unsafe events in the approach and landing stage is regarded as the emergent characteristic of the system, and the safety problem is transformed into the control problem. This paper firstly introduces the background of the research, the shortcomings of the traditional security analysis methods and the application of the STPA method in other fields. Secondly, the basic principles of the STAMP model and the STPA analysis method are briefly introduced, which lays the foundation for the safety analysis of the approach flight. Thirdly, the STPA method is applied to the flight safety analysis in approach and landing, which defines the unsafe control action at this stage, analyzes the scene of the unsafe control behavior; taking the action that providing incorrect height, velocity and slip angle (UCA1) as example, we analyze the specific causal factors of this unsafe control action of pilots. Finally, based on the simplified kinematic calculation framework, the kinematics calculation and analysis is carried out. This paper makes a specific calculation of UCA1, and carries out the quantitative safety analysis based on STPA, which shows the effectiveness of STPA method in the safety analysis of approach and landing. [ABSTRACT FROM AUTHOR]