The invention relates to a smelting continuous casting method for alloy die steel 1.2311. The technical route includes molten iron pretreatment, converter smelting, LF furnace refining, RH furnace refining and slab continuous casting and includes the specific steps that firstly, desulfuration, the final temperature and the C content are controlled in the converter smelting process, and molten steel is alloyed during tapping; secondly, the temperature rising temperature, argon blowing stirring and the carrying-out temperature are controlled in the LF furnace refining process; thirdly, the vacuum degree, the vacuum time and the molten steel carrying-out temperature are controlled in the RH furnace refining process, and the components of the molten steel are adjusted; and fourthly, the pulling speed, the reduction amount, the reduction position and the cooling strength are controlled in the slab continuous casting process. By means of the smelting continuous casting method for the alloy die steel 1.2311, the purpose of smoothly producing the die steel 1.2311 is achieved by adopting a converter-secondary refining-continuous casting manner, in addition, the technical process is simple, operation is convenient, controllability is high, and chemical components of finished steel and quality of a cast blank can meet requirements.