By translating this real cubic system into a complex planar system, an applicable linear algebraic recursion formula of the equator and the first 6 quantities of the equator are given. Stability of Equator for a Class of Odd Number Degree Polynomial System 将这类实三次系统转化为复平面系统研究,给出了系统赤道环量的易于计算的线性代数递推公式。一类奇数次多项式系统赤道环的稳定性