国债利率的期限结构是指各种不同期限国债的利率或收益率与期限之间的数量关系。用坐标来表小，剩余期限作为横坐标，利率或收益率作为纵坐标，把不同的剩余期限对应的利率或收益率水平连成一条曲线，即为国债利率期限结构曲线，或收益率曲线。

The maturity structure of the Treasury bill rate is the number of relations between various term government bonds, interest rate or yield and maturity. Coordinates table small remaining period as abscissa, interest rates or yields as the ordinate, the different remaining period corresponding to the interest rate or yield level connected into a curve, the term structure curve is the Treasury bill rate, or yield curve .