110 ground observations of the precipitation distance percentage in Henan Province were applied to evaluate the agrometeorological drought zoning and risk probability analysis for winter wheat with fuzzy clustering algorithm based on grid. Indicators of spatial association indices-Moran scatter plots and LISA cluster map were adopted to conduct to the spatial exploratory data analysis.The results indicated that 17 counties(cities) of Jiyuan,Puyang and Shangqiu and so on fell into the first quadrant with “high high”;12 counties(cities) of Xinyang,Zhumadian and Kaifeng and other regions fell into the third quadrant with “ low-low”,where these regions existed strong positive correlations with more precipitation;6 counties(cities) of Xinyang,Zhumadian and Jiaozuo,Qixian,Huaiyang fell into the fourth quadrant with“high-low” and the second quadrant “low-high” respectively, where these regions existed strong negative correlations.It could be concluded that the correlations of spatial variation of precipitation among counties was small.Then,fuzzy k means was used to divide the precipitation distance percentage data into five classes,while the fuzzy performance index(FPI) and normalized entropy(NCE) were the smallest.There existed significance between different zones at the 0.05 level by One-Way ANONA test.According to the distribution maps,the spatial and differential laws of drought could happen in Henan.The south-west of Xinyang and Nanyang belonged to the humid area with lower drought risk probability;Sanmenxia,parts of Puyang,Anyang and Kaifeng counties belonged to the region of severe drought with higher drought risk probability;most areas of Zhoukou and Luohe belonged to the drought-stricken area.The high risk probability was mainly distributed in the western mountainous areas such as Sanmenxia,Nanyang and other western mountainous areas and Xuchang and Zhengzhou.The low risk probability value areas were mainly in the rice growing areas such as northeast and Xinyang.This was consistent with the spatial distribution of the drought, but there were also differences in some regions,such as the high level of drought in parts of
Puyang,but low risk probability value.