Cylinder rotational speed and forward speed are two main working parameters of spring-finger cylinder pickup collector. Harvesting, different ways of storage and transportation also have forage moisture content requirements. Through researching the influence law of forage moisture content and working parameters on the pickup collector collecting performance, the pickup performance index of optimal parameter combination can be got, and it can be used to guide the actual production and provide technical support and theoretical basis for pickup collector design and manufacturing. For collecting alfalfa, taking cylinder rotational speed, machine forward speed and forage moisture content as test factors, taking power consumption and leakage rate of picking up as performance index, orthogonal experiments were done on the original device of spring-finger pickup cylinder collector and the improved convex contour line device at the same time. Through the orthogonal experiment and the springfinger end of acceleration experiment, effects of the three factors on collecting performance were analyzed. Levels of orthogonal test factors were selected from single factor experiment results, namely the machine forward speed of 3.5km/h, 4.0km/h and 5.0km/h, cylinder rotational speed of 42r/min, 50r/min and 60r/min, forage moisture content of 15.1%, 17.3% and 22.3%. The test results showed that the CAM track had greater influence on collecting performance, the cylinder rotational speed and forage moisture content had extremely significant effects on working performance, the machine forward speed had influence on working performance. The affecting sequence of importance for three factors on power consumption and leakage collecting rate were cylinder rotational speed, forage moisture content and machine forward speed. When cylinder rotational speed was 42r/min, forage moisture content was 15.1%，and machine forward speed was 4.0km/h, the collecting performance of the pickup collector was the best．Through the spectrum analysis, it was concluded that the spring-finger end acceleration was increased with the increase of forage moisture content, power consumption was increased and pickup leakage rate was declined with the increase of forage moisture content. It would lay research foundation for the spring-finger pickup cylinder collector to match the optimal working parameters and structure parameters and collecting performance for the future.