椭圆孔型是轧制圆钢和线材的最常用的孔型。国外学者作了大量的研究工作,得出了种种近似的椭圆孔型半径公式,但都或多或少地存在些问题,不是计算复杂,就是结果不准确。我们在研究这些公式的基础上,用逐步完善和逐步求全的办法,导出了椭圆孔型的半径公式。我们的新公式应用到小型圆钢和线材上得到了满意的结果,克服了苏联乌克兰科学院院士契克马略夫和米列斯柯一起导出的公式的局限性。 Oval hole type is the most commonly used round bar and wire pass. Foreign scholars have done a lot of research work, and come to all kinds of approximate elliptic hole radius formula, but all have more or less some problems, not the calculation is complex, the result is not accurate. Based on the study of these formulas, we derive the formula of the radius of the ellipse by using the method of gradual improvement and gradual improvement. The application of our new formula to small round bars and wires has yielded satisfactory results, overcoming the limitations of the formulas derived by the Chekhovov and Milleishko of the Ukrainian Academy of Sciences.