【摘要】 从Ｌａｐｌａｃｅ方程的积分解出发，推导三维静电场边值问题的多极理论通解，推导出多极理论中不可能出现第二类Ｌｅｇｅｎｄｒｅ函数，给出了三维多极理论和广义多极技术的最佳适用范围。这种方法也可用于计算某些磁场问题更多还原

【Abstract】 deuces the MT′s(Multipole Theory)general solution formula of 3-Ddelectrostatic field equation,proves a law that the second Legendre function is unnecessary in the MT agives the optimum utilization condition of the MT and the GMT (Generalized Multipole Technique),from the integration solution of Lapace equation.This method can also be used to solve some magnetic problems.更多还原