Abstract: In order to understand organic manure variation characteristics over 28 years in Tonglu District, we put forward proper countermeasures of organic manure, and improve soil fertility and agriculture sustainable development in Tonglu County. The author used the status of farmland organic manure to compare in pair with the data measured in the second national soil surveys. The results showed that: levels of organic matter in cropland in Tonglu County of Hangzhou had declined by 19.4% (from 30.9 g/kg to 24.8 g/kg) over 28 years. The main reasons included the reduction of the acreage under green manure, the addition of land consolidation and construction land. But organic matter levels were now being maintained in the clayey soils. Therefore, the author put forward improvement measures, such as inputs of crop residue, fertilizing green manure, adding animal manure and organic fertilizer soil. The rotation system of rape-rice can be chosen to suit local cropland.