Abstract: Taking Luohe city, Henan province as the research area, from the perspective of agricultural production water footprint, the CROPWAT software was used to calculate the green water and blue water footprints of the main crops wheat and corn during the growth period. The grey water footprint of crops based on the amount of nitrogen fertilizer and phosphate fertilizer was calculated, the water footprint of agricultural production was comprehensively evaluated, and the composition of the agricultural water footprint and its spatial distribution characteristics in Luohe city were analyzed. The results showed that the areas with the largest green water and blue water footprints for crop growth in Luohe city were the Yuanhui areas, and the area with the largest grey water footprint was Linying county;the proportion of agricultural green water footprint in the total water footprint showed a characteristic of gradually decreasing from south to north in space. The proportion of agricultural blue water footprint in each county （district） to the total water footprint was about 30%. The proportion of grey water footprint in Linying county was much higher than that of other counties （districts）, so we need to focus on the amount of fertilizer application; the agricultural water footprint of Luohe city was relatively high. Measures such as improving the water resource consumption accounting system, accelerating technological innovation to reduce the water consumption of agricultural production, adjusting the water consumption structure, and rational application of fertilizers and pesticides can be used to reduce agricultural water consumption.

Key words: water footprint, agricultural production, grey water footprint, sustainable use, spatial analysis, Luohe city