The internal structure machine is internally provided with an extrusion mechanism, a rice hopper, three sets of quantitative rice dividing devices, a rice outlet groove, a plate positioning device and a rice beater control system. According to the detailed product description of the automatic rice beater, the automatic rice beater is divided into internal structures. The machine is internally provided with an extrusion mechanism, a rice hopper, three sets of quantitative rice dividing devices, a rice outlet slot, a plate positioning device and a rice beater control system. The invention adopts an extrusion mechanism, a quantitative rice dividing device and a plate positioning device, which are connected with the control system of the rice threshing machine, so that an unsupervised self-help form is realized, the rice threshing efficiency is improved, and the accuracy of the size of each rice serving is ensured.