In this paper, by using the analysis of standard interpolation polynomial, we give the theory of truncating error on nonstandard interpolation polynomial.
通过对标准形式插值多项式的截断误差分析，给出了非标准形式插值多项式的截断误差公式。
The interpolation polynomial is applied in curve fitting for easy calculation and analysis and better representation of CT10%error curve.
采用多项式拟合曲线，可以发挥其便于计算和分析的优点，能够更好地反映电流互感器10%误差特性，使用方便。
应用推荐