Abstract: Rapeseed dehuller with a principle of impact and separating system with a principle of suspending and cyclone were designed and manufactured. The fitting dehulling conditions are confirmed: water content 8%～10%, linear velocity of material casted tray 54.22～61.96 m/s. Under the condition mentioned above, dehulling rate is more than 95%, rate of fines is less than 3%, kernels contained in hull is less than 1%, hulls contained in kernel is less than 2%. The YTTP75 rapeseed dehuller and separating system were put to use successfully. Cold pressing rapeseed oil and dehulling rapeseed meal with high quality were obtained, which increased processing value of rapeseed.