When the oil press runs, the treated oil enters the press chamber from the hopper. By pressing the screw, the embryo is pushed inward and pressed. The blank is in the state of motion under the press of the squeezing chamber, the pressing chamber pressure conditions, the friction between the material and produce large embryo squeezer, blank and pressing chamber, so that the blank material of micro friction caused by the relative motion between. On the other hand, as the diameter of the root garden is gradually increased, the pitch of the screw is gradually decreased,Thus, when the screw is rotated, the thread can be pushed forward by the hard material, and the material can be turned outwards, and the material layer near the screw thread at the same time can rotate as the press shaft rotates. Thus, each particle in the cylinder does not move in the same direction as the velocity, but rather there is relative motion between the particles. The heat generated by friction and meet the required oil process of heat, contribute to the protein thermal denaturation to blank, destruction of the colloid, increased the plastic, but also reduces some viscous oil to precipitate easily, thus increasing the oil press oil yield, the squeezed material the oil pressure, and from the garden and a row row gap gap outflow.