The paddle mixer with twin shaft overall structure design is compact and occupies less space, which is convenient for the installation of the whole machine and the transformation of equipment. The combination of mechanical seal and pneumatic seal is adopted to eliminate the phenomenon of material leakage. The mixing barrel is made of wear-resistant material and has a long service life. The stirring device adopts the principle of non-gravity mixing or Gravity-free mixer, which makes the mixing effect better and the stirring more complete. The unloading method of the large open door shortens the unloading time and improves the efficiency, and can ensure that there is no residue. The domestic first-class brand motor reducer makes the equipment run continuously and stably.