Abstract: The relation between ecological organic fertilizers and sustainable development of agriculture is studied in this paper，showing that the microbial ecological organic fertilizers can improve the soil’S nutrition supply to plants with N，P and K；increase the plants’disease resistance；decrease the pests；and extend straw oomposting to make the soi1 refertility；reduce the use of chemical manure and pesticide；SO as tO make a good circulation of agriculture and realize the sustainable development of agriculture．