Abstract: Disclosed are a quick simulation and optimization method and system for analog circuits. Aiming at a problem that a customized circuit model is difficultly modeled in a design process of the analog circuit, and the problem of a low circuit design efficiency caused by a slow electromagnetic field simulation speed, the invention proposes to firstly construct a device library, build a circuit and interconnect an AI network to obtain a comprehensive network parameter of the AI network; the comprehensive network parameter in a simulation process is compared with a network parameter target of an analog circuit, and an circuit layout of the analog circuit corresponding to the AI network is output to a three-dimensional full-wave electromagnetic field simulation tool for simulation and verification when requirements are met.