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Rice is one of the main crops in southern China. Residual straws after machine harvest bring big difficulty for paddy fields tillage. Boat rotary tillage and stubble-mulch machine is a new tillage equipment of mechanized protective cultivation, which is suitable to rice multi-cropping paddy fields. It can complete prostrate straw, rotary tillage, stubble-mulch, and level off paddy field simultaneously, and could realize moderate tillage of paddy fields, return stubbles to fields with combined operation of mechanized. The spiral rotary tillage and stubble-mulch roller is the main working parts and the leading power consuming parts of the boat machine. At present, only qualitative test and analogy method are used to analyze the power consumption of the new roller, the inaccurate data obtained cause great difficulties for study on rollers working mechanism and parameter optimization. Therefore, reasonable method is needed to measure the rollers power consumption.