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85%。 A new no-till seeder, named 2BMX-5 no-till wheat-maize seeder, has been developed by China Agricultural University to solve the new problem of no-till seeder which the openers was braded that led to increase soil disturbance and fuel consumption in the area of one crop per year of North China. The wedge-shaped with front knife no-till opener consisted of front blade and pedestal and new driving device have been designed, and the split front blade was also designed. Field performance test was made in the field covered with wheat and rice residue in Inner-Mongolia and Ningxia. The results showed that the machine worked well without blockage and the depth of seeding and fertilizing could satisfy the agronomic requirement. Anti-blockage was improved and soil disturbance was decreased after adopted the wedge-shaped with front knife no-till opener. The seeding quality has been improved, and the results showed the cut stubble ratio was over 85 percent in the field covered with rice stubble.