Abstract: Man-made marsh fertilizer is the by-product which is made by manure, organic wastewater and residues of farming being fermented. Study shows that marsh fertilizer contains many kinds of nutrient elements and useful materials which are widely used in farming, forestry, stockbreeding, sidelines and fishery, etc. it is good qualified organic fertilizer for planting; it is favorable breed additive and raw material of derivative breed for breeding; for agricultural sidelines, it can be made into many kinds of high-value by-product and commodities.