Abstract: Soil acidification has become a limiting factor for crop growth in north China. In this paper, soil acidity of cultivated land in Henan Province was comprehensively expounded by analyzing field soil samples. The remediation measures of acidified soils were researched and promoted by means of field investigations and experimental demonstration. The results showed that soil acidification began to emerge in Henan. Adding alkaline soil conditioner, lime, calcium magnesium phosphate and alkaline fertilizer could make seasonal crop yield in severely acidified soil increase by more than 120%. At the same time, combining with agricultural resources in Henan Province, the authors summarized soil acidification regulation approaches, including an establishing soil testing and formulated fertilization system with pH value as the index, expanding straw returning to field, reasonably using livestock manure, deepening tillage to increase the depth of topsoil and so forth.