A test sheller for rubber fruit was designed and manufactured according to the principle of extrusion-grind, and it consisted of units of driving and extrusion-grind, the lectrical elements for realizing automatic clockwise and anti-clockwise running of motors, and the frame, etc. Adopting the principle of reciprocating friction and extrusion, the fruit shells were separated under the dual of friction and extrusion pressure. Our results showed that the device could perform well and was, easy to operate, especially, the hulling rate could reach 78.3% by using it. Thus this sheller could be utilized in researches on effects and the mechanism of rubber fruit shelling. The device provides the technological base for the research of high efficiency and low damage rubber fruit sheller.