Abstract As a safety analysis method based on STAMP model, the STPA method shows strong capability and advantages for safety analysis of complex systems. The analysis STPA process and ARP-4761 was compared, and the conformity of STPA to GJB900A-2012 general requirements for equipment safety work was analyzed, which reflects the great advantages and applicability of STPA method. In order to solve the problems found in STPA’s safety analysis, some improvement measures are proposed in building functional control structure, identifying unsafe control behaviors and analyzing causes. The conclusion and proposed method can provide the theoretical and process guidance which is in line with the high-tech characteristics of modern aircraft and worthy of reference for the system-level safety design of complex aviation products and even military aircraft.