Abstract:Abstract:The sapium sebiferum Roxb.is a rare oil crop, the seeds can be extracted simultaneously two oil–sapium fat and kernel oil. Sapium sebiferum Roxb.seeds remain black kernel after dewaxing operating, which process is very important for raw material of kernel oil. The decorticator of sapium sebiferum Roxb.seed is made up of hopper,feeding regulator,rollers of adjuster,motor,drive mechanism,blower and twin-roll. Through analyzing the twin-roll working area ,decortication process and the particle size of Sapium sebiferum Roxb.seed,the width of twin-roll will be regulated. Sapium sebiferum Roxb.seed fell into workspace of decortication by gravity. After rolling and decorticating with rollers, blower will separate of seed kernel from seed. The authors put forward production capacity and technical parameter of the decorticator, which can supply the industry needs and after processing requirements.