The harvesting straw feed crops (silage corn, alfalfa, herbaceous mulberry, etc.) was tedious, high-labor-cost, and large-nutrient-loss. A self-propelled straw forage crop harvester, which could realize the integration of cutting, flattening and modulating, chopping, and throwing straw forage crops, was designed. The cutting angle could freely be adjusted between 0° and 8°. The max rotation speed of the flattening roller could reach 590 r/min and could be adjusted consecutively by the hydraulic control device. To verify the performance of this machine, several harvesting experiments of alfalfa, silage corn, and herbaceous mulberry with different moisture, were carried out on this machine. During the experiment, the average working speed of the machine was 1.6 m/s, the cutting height was 40–80 mm, and the flattening rate was 97.14%. It is determined that the suitable cutting speed for harvesting alfalfa is 2131 r/min; the suitable cutting speed for harvesting silage corn is 836 r/min; the suitable cutting speed for harvesting herb mulberry is 1045 r/min. The design of the machine can not only improve labor productivity and reduce the nutrient loss of forage crop but also support the silage harvesting machinery and equipment for forage crop.

秸秆饲料作物（青贮玉米、苜蓿、桑椹等）的收获繁琐，人工成本高，养分损失大。设计了一种自走式秸秆牧草作物收割机，可实现秸秆牧草作物的割、平、调、切、抛一体化。切割角度可在0°和8°之间自由调节。压平辊最高转速可达590r/min，并可通过液压控制装置连续调节。为了验证该机的性能，在该机上进行了多次不同水分的苜蓿、青贮玉米和草本桑的收获试验。试验过程中，机器平均工作速度为1.6 m/s，切割高度为40-80 mm，压平率为97.14%。确定收获苜蓿的适宜切割速度为2131 r/min；收获青贮玉米的适宜切割速度为836 r/min；采收药用桑树的适宜切割速度为1045 r/min。该机器的设计不仅可以提高劳动生产率，减少牧草作物的养分流失，而且可以配套青贮收获机械设备用于牧草作物。