Continuous casting method suitable for special steel with non-crossed content of elements such as carbon, silicon and manganese

The invention discloses a continuous casting method suitable for special steel with a non-crossed content of elements such as carbon, silicon and manganese, and belongs to the technical field of ferrous metallurgy. According to the method, the same continuous casting tundish is adopted for casting different steel types, various chemical elements such as carbon, silicon and manganese of the steel are not crossed, and stable control over a low liquid level of the tundish and accurate grasp of retention time are key to success; additional equipment does not to be added, the operation is simple and feasible, and the amount of generated waste blanks is small; and with the continuous casting tundish with a dam weir with the net weight of molten steel being 45t as an example, the steel scrap amount is basically about 35t, meanwhile, a new continuous casting tundish does not need to be consumed, casting does not need to be reorganized, head cutting and tail cutting are not needed, and the production cost is greatly r