It is suitable for dyeing yarns of polyester silk, embroidery thread, silk, nylon, polyester cotton, CERN, nylon, mercerized cotton, etc. The weir flow jet tube is adopted, the dyeing tube and the yarn turning and transferring tube become a whole, the dyed material has absolutely no twist or knot phenomenon, but it is easy to pour the tube after color, and the loss rate is low. Low energy consumption, low head and large flow mixed flow pump. The water quantity regulator can adjust the water quantity arbitrarily depending on the number and type of dyed yarn.