Linglong granitic complex is a compound rock body characterized by long evolutionary history and multiple reformation and remelting, with Guojiadian type and Guojialing type rock bodies being of Early Yanshanian and Late Yanshanian respectively. Inversion of 16 gravity and magnetic profiles shows that Linglong granitic complex is a rock body in the form of winnowing pan, with Guojiadian as the remelting center. It assumes low angle overlap northward and high angle contact with wall rocks southward, and over 86% gold deposits occur in places with the rock body thickness less than 4km. Different positions of Linglong granitic complex have different source rock compositions. According to spatial forms, source rocks and tectonic frameworks of the rock body, the Linglong granitic complex was divided into different rock areas with different rock forming and ore forming characteristics. The mathematic modeling of the formation of Linglong granitic complex revealed that in the remelting process, the enrichment of gold in fluid facies and the circulation of fluids driven by heat of the rock body constituted the basic factors responsible for the development of gold mineralization.