An axial threshing-separating-cleaning test-bed with easily adjustable working parts and parameters was developed based on the modularization design. The threshing-separating-cleaning index mark and the distribution of materials after rethreshing was acquired under different working conditions. With industrial computer and acquisition cards as control center, a measurement and control software were programmed to collect, display and analysis data of motional parameters such as rotational speed, vibration frequency, torque and power consumption, et al. The experiments on the test-bed can provide the data for the optimization of cleaning mechanism structure and working parameters for axial combine harvester.