MeCartney和Levine[4]曾用积分方程法导出过等球颗粒相互作用能的近似表达式,在κa≥5时误差<3％。Ohshima[5]等对球颗粒做了曲率核正对HHF公式[3]做了改进,唯公式过去复杂,不便于应用。我们现在提出一个新方法,将三维Poisson—Boltzmann方程仍化为一维问题,计算结果表明它比Deriaguin法精确地多,和OCHW[5]法结果相当吻合,但表达式却简单地多。 MeCartney and Levine [4] used the integral equation method to derive the approximate expression of the interaction energy of the isobaric particles. The error was less than 3% when κa≥5. Ohshima [5], such as curvature of the ball particles made on the kernel HHF formula [3] has been improved, the formula complex in the past, not easy to apply. We now propose a new method to decompose the three-dimensional Poisson-Boltzmann equation into a one-dimensional problem. The calculation results show that it is more accurate than the Deriaguin method, which is in good agreement with the OCHW [5] method, but the expression is much simpler.