Mixer is such an equipment which is composed of horizontal rotating vessel and vertical agitating blades. When it is mixing or agitating , vessel can turn left , blade can turn right. Due to the working of countercurrent, the molding particles’ movement are crossed and increased the friction each other . The countercurrent ‘s mixer has a small pressure , low heat generation ,high mixing efficiency and relatively uniform mixing . The mixing is relatively uniform and loose, there is few dead ends which is clean and smooth to discharge. The mixer is high production efficiency and is high strong anti-worn out.