Using the SWAT model to simulate the spatiotemporal distribution patterns of blue and green water resources in the Qingliu River Basin during the impact periods of El Nio and La Nia events, and using set pair analysis to analyze the evolution characteristics of blue and green water resources in the Qingliu River Basin at multiple time scales. The results showed that during the impact periods of El Nio and La Nia events, the green water resources in the Qingliu River Basin were 12.0 mm and 69.7 mm higher than the annual average, the blue water resources were 115.7 mm and 138.2 mm lower than the annual average, and the green water coefficient was 9.3% and 12.9% higher than the annual average, respectively. During the periods affected by El Nio and La Nia events, the blue water resources in the Qingliu River Basin belong to the dry category, while the green water resources belong to the wet and normal categories. The blue water resources in the Qingliu River Basin belong to the dry, normal, dry, and normal categories during the four stages of 1967-1979,1980-1992,1993-2005, and 2006-2018, respectively. The green water resources belong to the wet, normal, wet, and normal categories, indicating that the evolution of blue and green water resources in the Qingliu River Basin has certain fluctuations.