Power consumption (torque) tests of a single universal blade for rototilling and stubble breaking were conducted in the soil bin, to investigate the influences of the tillage depth and rotary speed of the blade as well as the working speed of the machine on power consumption. The regression equations for the relations between power consumption and the above parameters were established. Soil bin tests indicated that the parameter that had significant influence on power consumption is the rotary speed, next is the tillage depth, and the working speed had less influence. Then the universal blades were mounted on the bionic intelligent rototilling-stubble-breaking machine to perform rototilling and stubble-breaking tests respectively. Field tests showed that the stability of the tillage depth is over 93%, stubble-breaking rate, stubble coverage rate and soil-crushing rate are 81.8%, 87.2%, 87.9% on average, respectively, which meets the agrotechnical requirements.