In this paper, the relationship between the flow of Heihe and the meteorological element during late spring and early summer is analysed with the data of Yingluoxia hydrometric station and Qilian meteorological station. It is found that the flow in April depends first on snowfall which have snowed before, secondly on the temperature of April; and that the flow of May and June depends first on the rainfall, secondly on the prevenient srowfall and the temperature of may. This study provides the basis of forecasting the flow.