This machine has two stages, driven by independent driving and transmission system. The first plodder is acting as a simplex refiner to make soap pellets in the vacuum condition. In the final plodder, the soap is pressed and extruded out in billets through the orifice to feed the downstream cutter or stamper. The motor and gear box driving has higher driving efficiency, and with specially designed sealing, it can avoid the oil leakage from the gearbox into the worm chamber to cause soap contamination. The lengthened worm chamber design can reach 1:6 for the screw diameter vs effective barrel length, which can extrude the material effectively and increase the compactness. The barrel inner body is made of high quality seamless stainless steel, without any water leakage. The refining plate or net can be installed on the first plodder front part to enforce the martial refining effects to optimization. The first plodder and final plodder speed can be adjusted by VFD. There is a level sensor on the vacuum chamber door to realize the auto run and stop control of the first plodder. Specially designed and continuously improved water cooling system and the different worm inner diameter and pitch design are especially suitable for the laundry soap and toilet soap. Except the aluminum worms, all parts contacting with soap are made of high quality stainless steel.