This paper put forward the new anti-blocking principle combining residue-throwing by powered-chain finger and residue-cutting by knife type opener, and designed the powered chain anti-blocking mechanism for no-till planter according to the problem of residue blocking of no-till wheat planting in heavy corn residue cover fields in annual double cropping areas of North China plain. Furthermore, the key parameters for powered-chain, chain finger and knife type opener were determined based on the analyses of the movement of anti-blocking mechanism. The field experiment showed that the powered-chain anti-blocking mechanism could solve the residue blocking effectively, so as to ensure the passing of wheat no-till planter. Through real-time clearing of corn residues before the knife type opener, 12.3% of opening force was decreased. Compared with the strip roto-tilling wheat planter, the powered-chain wheat no-till planter could not only seed and fertilize at the suitable depths, but also decrease soil disturbance and fuel consumption by 66.4% and 8.07%, respectively, which indicates that this new planter can meet the requirements of agronomy in North China plain.
