In order to reduce the power consumption, reduce the blockage of the threshing roller and improve the harvesting efficiency of the rice combine harvester, a drum-shaped rod-tooth longitudinal axial flow threshing roller was designed, and its power consumption was studied by simulation and experiment. The cylindrical rod-tooth longitudinal axial flow threshing roller with the same external dimensions was used as a control, and the total torque of the threshing roller rotating shaft was used as the test index. The comparative test based on the discrete element method was carried out. There is a significant difference in the total torque of the threshing roller rotating shaft of the structure. The total torque of the rotating shaft of the drum roller is smaller than that of the cylindrical roller, and the larger the difference is with the increase of the feed amount. A bench test for comparing the power consumption of two threshing roller structures consistent with the simulation conditions has been carried out. The results show that: within the feed rate of 0.8~1.6kg/s, it is comparable to the cylindrical roller with the same external dimensions and the roller structure threshing The roller power consumption is reduced by 5% to 15% on average. As the feed volume increases, the power consumption increases. Compared with the results under the simulation test conditions, the increasing trend of power consumption is different. Under the bench test conditions, the increase in power consumption is decreasing. Other laws are basically the same. Provide reference for the structure design of low-power rice threshing roller.