min，前进速度1.5m/s。Based on the field experiment, and by means of theoretical analysis, uniform design and the data quasi-level processing method, the multi-objects fuzzy optimization mathematical model, which uses the stubble cleaner’s high production efficiency and low power consumption as the goal, uses the machine advance speed, cutter rotating speed and machine width as the working parameters, are developed. The regulation about how the working parameters of stubble cleaner affect the goal is put forward. When the machine width is a fixed value, the goal level will be increased fast with the increasing of the machine advance speed and increased with the increasing of the cutter rotating speed; when the cutter rotating speed is a fixed value, the goal level will be increased fast with the increasing of the advance speed and increased slowly with the spreading of the machine width; when the advance speed is a fixed value, the goal level will be decreased slowly with the spreading of the machine width and the increasing of the cutter rotating speed. The optimization is conducted in the feasible area which is limited by the constraint conditions. The best working parameters of the machine width is 1.42m, the cutter rotating speed is 406r/min and the advance speed is 1.5m/s.