Abstract: Henan is an important core area of grain production in China. Improving the modernization level of farmland and water conservancy in Henan is of great significance to ensure food security and national security. According to the five categories of irrigation and drainage,management technology,ecological environment,economic benefits and development support,this paper divides five main indicators and 18sub-indicators,which constitute the comprehensive evaluation index system of farmland water conservancy modernization level in Henan Province. Based on the entropy weight model and spatial analysis method,the spatial-temporal evolution of farmland water conservancy modernization level in Henan Province is analyzed by using the data of five consecutive years from 2015 to 2019. The results show that from the comprehensive level,the index weight of irrigation and drainage level is the largest. Among prefecture level cities,Zhoukou has the highest level of farmland water conservancy modernization,while Jiyuan has the lowest level. From the perspective of spatial distribution,the spatial distribution of farmland water conservancy modernization level in Henan Province has a significant spatial positive correlation and small spatial heterogeneity. The“insignificant”type area is dominant（more than 50%）,and the HH and ll type areas account for about 35%. In terms of landform,the modernization level of farmland water conservancy in plain areas is generally higher than that in hilly areas. At present,only Zhoukou district,Luohe district and Hebi district have reached the preliminary modernization stage,and the rest of Henan is still in the stage to be strengthened.