本文提出一种广义电容矩阵的方法，用以优化设计ＴＥＭ传输线梳状及交指滤波器。文中引入了基次及高次ＴＥＭ模，模式电容及其互电容，负载电容等概念，把原先只考虑空间电容的矩阵扩展为包括各次ＴＥＭ模式电容在内的广义电容矩阵，这就可以把矩阵级联法用于复杂结构的计算，提高了优化设计的灵活性及计算精度和速度。 In this paper, a generalized capacitive matrix method is proposed to optimize the design of the TEM transmission line comb and the interdigital filter. This paper introduces the basic and high-order TEM mode, mode capacitance and its mutual capacitance, load capacitance and other concepts, the original space only consider the capacitance matrix expansion to include TEM mode capacitance, including the generalized capacitance matrix, which can put The matrix cascade method is used for the calculation of complex structures, which improves the flexibility of design optimization and the precision and speed of calculation.