The all-in continuous casting machine also called continuous casting machine for steel billet, is different from other casting processes. In this process, the surface of the liquid steel and the billet can be dynamically steady. On the one hand, the liquid steel solidifies against the mould walls, and on the other hand, the billet solidified is pulled out from the bottom of the mould at a steady speed. Thus, the interface of the liquid steel and the billet will be at a relatively constant position as time goes on. By continuously pouring molten metal into a water-cooling mould, and pulling the solidified (crust) casting out from the other end of the mould, we can get billets of any length or a specific length. The process above is completed with the continuous casting machine for steel billet. This is why it is called the all-in continuous casting machine.