With the vigorous development of the transportation industry, the flight area system has become more and more complicated. Complex flight areas have exposed the safety management faced with challenges. According to the standards of civil aviation industry, classical material elements are established after the classification of grades. Each abnormal weather is used as an object to be evaluated. After data correction, a matter element analysis model is used to define the safety operation level of the flight area under abnormal weather. Finally, through the case analysis, the feasibility of the assessment method was verified.