The invention discloses a multi-set threshing grass chopper for rice. The multi-group threshing grass chopper for rice includes multiple sets of threshing grass chopping devices, each set of threshinggrass chopping device includes a threshing cylinder, a grain receiving trough plate, a grass chopping cutter, a standing grain pulling belt and a standing grain pulling pulley, wherein the threshingcylinder is provided with threshing teeth; the grain receiving trough plate is arranged below the threshing cylinder; the grass chopping cutter is arranged above the middle of the grain receiving trough plate; the standing grain pulling belt is connected on a rotating belt pulley and a supporting belt pulley in a cross mode, provided with a standing grain pulling curved-tine and arranged below thegrain receiving trough plate, and the standing grain pulling curved-tine on one side of the standing grain pulling belt is exposed out of one side of the grain receiving trough plate; the standing grain pulling pulley is arranged above one side of the front end of the grain receiving trough plate, and matched with the standing grain pulling curved-tine to make rice ear rods transversely enter thegrain receiving trough plate; the front end of the grain receiving trough plate is a rice ear inlet. The multi-set threshing grass chopper for rice overcomes the deficiencies of an existing model, the complete machine is light in weight, simple to manufacture, durable in use and ultra-wide in range of threshing, and is the best optimized model for an oversize grain storage barn.