分析确定了合金白口铁铸件浇冒口系统计算的数学式与系数范围，编制了ＣＡＤ的框图及程序，并根据计算结果，绘制了浇冒口系统的三视图和有关剖面图。研究结果表明，该程序具有使用方便、计算结果准确可靠、运算及绘图速度快等特点，提高了铸件工艺出品率，具有明显的经济效益和广阔的应用前景。 The math formula and coefficient range of the calculation of pouring and riser system of white iron alloy castings were analyzed and determined. The block diagram and program of CAD were compiled. According to the calculation results, three views of the pouring and riser system and related sectional drawings were drawn. The results show that the program is easy to use, the results are accurate and reliable, the operation and drawing speed is fast, and the yield of castings is improved. It has obvious economic benefits and broad application prospects.