The multi-roller contact roller-gear cam reducer is presented.It’s a special kind of the roller-gear cam that changes the stopping stage of the indexing cam to zero and chooses the equal-velocity law.And with multi-roller contact the carrying capacity is greatly improved.The equation of the working surface of the roller-gear cam is built.Then the solid model of the reducer only is created by using the software UG NX7.0.This method is pithy