Abstract:Abstract: Today, ridge tillage method is an effective farming method that can resist the drought and flood in the northeast area of China. Because of the climate and natural conditions, most of the northeast area of China will continue to adopt ridge tillage method. In the case of ridge planting, no-till can improve the ground temperature, and can control the summer flood and drainage. In recent years the strip rotary tillage type no tillage planter has been extended. Because of the rotary tillage, the root stubble is broken and the anti-blocking performance is good. However, the soil tillage intensity is between 6.5 and 7.8, and the tillage destroys the original ridge, and forms the new ditch. At present, the number of no tillage finger clip type precision seeding and fertilizing machine applied in the production, is about 3000 in the northeast area of China, and the soil tillage intensity index is 1, which reduces the soil tillage intensity and produces no new ditch; but the two-row machine has the complete machine weight of 1000 kg, which brings too large compaction on soil, and makes ridge stand almost flat, therefore, wheel rut compaction seriously affects maize root growth. This machine not only loses the advantage of ridge planting, increases soil hardness, but also enhances manufacturing cost, and makes the price per machine high. The cost of the field operation is greatly improved, which does not accord with the requirements of energy saving and emission reduction in agricultural production. For no tillage planter, the current problem is the existence of the problem remains a ridge shape. Aiming at the requirement of researching and developing new no tillage planter for the conservation tillage corn ridge agricultural technology in the northeast area in China, based on the Archimedes spiral theory, this paper analyzes the notched disc knife break crop performance and the technical requirements to stubble breaking cutter for ideal seed bed, optimizes the spiral notched disk break stubble cutter structure and carries out the optimal selection of parameter; and develops the stubble breaking ditching device and stubble breaking anti-blocking device. Through test verification of stubble breaking ditching device, it opens a "V"-shape groove, and 2 pieces of spiral-notch disc cutters have a diameter of 350 mm, when sowing depth is 40 mm, sowing and ditching width is 28 mm. Increasing the weight makes the stubble breaking ditching device achieve a weight of 100 kg, and in the area implementing high stubble conservation tillage mode and with a field coverage rate of 30%, stubble breaking ditching device can be adopted instead of the conventional planter seeding furrow opener, and ordinary seeder can realize no tillage planting. When stubble breaking anti-blocking device's breaking stubble depth is between 70 and 100 mm, ditching width is 40-50 mm, and ridge cleaning width of ridge cleaning parts is 210 mm, which are up to the requirement of agricultural technology. Increasing the weight makes the monolithic disc broken stubble device achieve a weight of 113 kg in the area implementing conservation tillage of high stubble breaking rod cover mode and with covering rate of 1 kg/m2, stubble breaking anti-blocking device can be adopted, and ordinary seeder can realize no tillage planting. In this paper, the development of the rolling disc coulter and its edge is Archimedes spiral gap, after test for many times, stubble cutting resistance is small, the weight of machines can be reduced, because it is a passive anti-blocking device, keeping the shape of ridge.