利率期限结构一直以来是金融领域的研究热点。随着利率市场化进程的不断加快,寻找到一种具有市场代表性的基准利率,从而为固定收益产品的定价提供基础。本文采用NSS模型和多项式样条模型对我国上交所国债的交易数据进行了拟合分析,通过对两种模型的分析比较,选择合适的方法对国债利率期限结构进行拟合。 The term structure of interest rates has always been a hot topic in the financial field. As the marketization of interest rates accelerates, a market-based benchmark interest rate is found, which provides the basis for the pricing of fixed income products. In this paper, NSS model and polynomial spline model are used to fit the transaction data of the SSE government bonds in our country. By analyzing and comparing the two models, we choose the appropriate method to fit the term structure of the interest rate of the government bonds.