Using differential method, we have calculated the dependence of anisotropically conductive adhesive high-frequency signal transmitting property on conductive particle property (including the shape and size of particles). Under AC bias, the smaller the size of conductive filler particle in the conductive adhesive, the better conductance it has. Through the theoretical calculation, we found that the conductance is inversely proportional to the radius (side length) if the shape of the conductive metal particle is a sphere (cube). If the shape of the metal particle is a cuboid or cylinder, the conductance is inversely proportional to the height, independent of the changes in the base.