Cutting table blocking is one of the common and serious problems for 4LBZ–125 head-feed rice combine. To improve it, an indoor test-bed based on this combine is designed. Taking the comprehensive score as evaluation indicator, the orthogonal and single factor tests were done on crop-lifting speed, cutting speed, transmission speed and walking speed of the machine. The orthogonal test showed that the walking speed and transmission speed had great influence on header performance. And the single factor test showed that the best speed parameter for crop lifting, cutting, transmission and machine walking is 0.8 m/s, 0.85 m/s, 1.1 m/s and 0.675 m/s, respectively. Validation and contrast tests were done between the combination of orthogonal test and the best parameter combination of single factor test. The result showed that the single factor parameter combination had the best transmission efficiency and satisfied the production requirements.