The application relates to the technical field of
agricultural machinery, and discloses a multi-stage differential
threshing mechanical rice and wheat harvester, which comprises a harvester main body, a harvester head arranged at the front end of the harvester main body, a
cutting knife part arranged at one end of the harvester head, and a grain divider arranged at the side of the harvester head; a pushing
assembly for protecting the
cutting knife part is arranged on the harvester head; and a folding
assembly for accommodating the grain divider is further arranged. The multi-stage differential
threshing mechanical rice and wheat harvester can realize the front pushing of the front end of the
straw and the root stubble of the
cutting knife part on the harvester head in a lifting moment through the
intelligent control of the arranged pushing
assembly, damage caused by
hooking is avoided, and the folding assembly arranged in linkage can simultaneously fold and accommodate the grain divider on the harvester head in the lifting moment, the protrusion is reduced, and the safety is improved.