Abstract: Corn straw harvester can complete operation of cutting corn stalks with two transport，feeding，rubbing silk，and collecting other project materials at a time.Main structure and working principle of the 4GRS-1000 type corn straw harvester were introduced.Structure and performance parameters of cutter drum，kneading machine，rub silk and other key components were designed.Unit forward speed and stability of machinery were analyzed.Machine can be hoisted by the 36.7～44.1 kW tractor，kneading length can be adjusted.Performance and production tests showed that the targets were to meet design and maize harvest straw rubbing silk technical requirements.