Abstract: Conservation tillage technology can effectively improve soil physical and chemical properties and solve many problems caused by straw burying and returning to field.It is an important technical measure to promote straw returning to field.Key problems in application of conservation tillage technology were explored and solved through experiments and demonstration studies.Conservation tillage technology models suitable for three planting structures of continuous cropping of wheat and maize，wheat and soybean，rice and rape in Anhui province were summarized.