Abstract: According to the problem of straw blocking when using domestic no-till planters to sow corn in the fields with wheat straw-covered and residues, To overcome this problem，an attachment was developed to allow no-till planter to handle large amounts of straw and residue and improve planter performance. The device is consisted of a passive and a power driven coulter. The passive coulter is a ground-driven notched one. It penetrated into no-tillage soil and cut residue. The rotation direction of the power driven coulter is reversed. It cuts the covered straw on the soil surface together with the passive coulter. The key parameters were analyzed and determined. The field experiment showed that the device could cut off about 96.2% wheat straw on the seedbed and nearly 98.7% residues in the seedbed. It was effective in solving straw blocking and ensuring the passing ability of no-tillage planter in the fields with wheat straw-covered and residues. The research can provides a reference for developing no-tillage planter.