Abstract: In view of difficulties in storage and utilization of corn stalks in our country，low reliability and poor adaptability of existing straw harvesting machinery，from perspective of cutting，crushing and baling theory and experimental research，operation technology of straw cutting，crushing and baling was proved.A traction type corn stalk cutting，crushing and rectangular baling machine which could cut，crush，convey and bundle whole corn stalks in one time for upright，laid or loose corn stalks in field was designed.Structural design of key components such as traction frame，cutting and crushing device，mesh-type material guide device，compression and bundling device were carry out，and prototype was trial-produced and tested.Test results showed that broken knots and shredding rate of prototype was 91.3%，bale rate was 99.0%，density of straw bales was 167 kg/m3，regular straw bales rate was 95.6%，and anti-drop rate of straw bales was 93.5%.Prototype had good operating performance and could meet requirements of relevant standards.Research results had realized integration of cutting，crushing and bundling of whole corn stalks，and could provide a reference for design of straw balers.