Limited strainer of grain-releasing transition belt on harvester

The invention relates to a limited strainer of a grain-releasing transition belt on a harvester. The limited strainer comprises a tensioning wheel, a tensioning and limiting support plate, a tensioning arm and an inhaul cable, wherein the tensioning and limiting support plate is connected with a grain-releasing transmission case, and the tensioning arm is movably connected with the tensioning and limiting support plate; the tensioning and limiting support plate comprises a limit support plate body, one side of the upper end of the limit support plate body is provided with an inhaul rope mounting rack, and the other side of the upper end of the limit support plate body is provided with a belt limit assembly; the tensioning arm comprises a tensioning arm body, a tensioning arm main shaft connected to one side of the tensioning arm body and a tensioning shaft small shaft connected to the other side of the tensioning arm body, and the tensioning wheel is arranged on the tensioning arm main shaft; the inhaul cable