Abstract: According to Gauss-beam's method principle and combined with the characteristics of metal mineral exploration, wave field of middle deep complex structures was studied through modeling, forward modeling record of high precision and high resolution was obtained and good result was achieved. According to the simulated experiment: Gauss-beam forward modeling can not only reflect the profile morphology clearly but also obtain the complex geologic structure. In the meantime, it can provide useful information for wave field character (especiallly the complex wave filed of metal minerals).