建立了铸铁水平连铸用结晶器水冷套的传热模型 ,并用有限差分法模拟计算了不同高宽比水道结构的水冷套系统传热过程。水道高宽比K值对水冷套冷却能力的影响规律是 :K值增加 ,水道内水流速、等效传热面积均减小 ,水套的冷却能力降低。并根据计算结果提出了圆结晶器水冷套的设计原则 The heat transfer model of water cooling jacket for cast iron horizontal continuous casting was established and the heat transfer process of water cooling jacket system with different aspect ratio was simulated by finite difference method. The effect rule of water aspect ratio K on the cooling capacity of water jacket is: K value increases, water flow velocity in the waterway, equivalent heat transfer area decreases, water jacket cooling ability decreases. According to the calculation result, the design principle of round mold water cooling jacket is put forward