In order to solve the problems of irregular spreading and hard to pick up for rape stalks, a rape windrower transportation device was designed with the combination of the belt and chain backward conveying. The device is mainly composed of reel spoke, cutting device, conveying device, separator and guide plate. The parameters of key components, such as the reel spoke, the conveying device, the separator etc, were determined to test the rape windrower device. The test results were showed that the design of rape windrower device can smoothly accomplished the cutting, conveying and laying. When the reel speed is 15 r/ min with transmission speed of 1.05 m/s, and forward speed of 0.65 m/s, the average laying angle was obtained to be 24.4 ° as well as the laying an average thickness of 53.5 cm and the average spread width of 95.4 cm.