Abstract: 【Objective】 To explore the method of alternate cropping pattern of flood and drought identification to provide theoretical basis for accurate identification of maize drought resistance. 【Method】 Using 157 maize inbred lines as materials, the three-repeat drought resistance coefficients of alternate cropping pattern of flood and drought method and conventional paddy-drought zoning method were tested, and the advantages and disadvantages of the two methods were studied by comparing the correlation coefficients between three repetitions. 【Result】 The results showed that the correlation coefficient between three repetitions was 0.692 ~ 0.755 (average 0.724) in conventional identification of flood and drought zones. The correlation coefficient between the three repeats was 0.835 ~ 0.887 (average 0.861) in alternate cropping pattern of flood and drought method. The repeated correlation coefficient of the alternate cropping pattern of flood and drought method is higher than that of the conventional rice-drought zoning method 18.9%. 【Conclusion】 Compared with the conventional method, the method of alternate cropping pattern of flood and drought identification has higher accuracy and repeatability, and is convenient for material observation, and can be used for large-scale identification of maize drought resistance.