The perfect policy implementation model based on Coase Theorem of Irrelevance provides frame of reference or criterion for the theoretical research of policy implementation. The theoretical development of any studies in policy implementation can gain inspiration from the relaxation of several key assumptions of perfect policy implementation. To be specific, from the relaxation of the rationality of actors, opportunism and information asymmetry, environmental uncertainties and other assumed conditions, people can directly deduce the loss of microscopic connection, macroscopic connections and the linking mechanism of information feedback in the actual policy implementation mode and thus exert internal effect on the effect of policy implementation. The research herein redefines the nature of "lost connections" in studies of policy implementation and attempts to discover and explore the lost connections of different natures and properties of more types so as to compare and analyze the causes for the lost connections of various types.