The Mesozoic is the most important period of magmatism in the Huaxiong Block.Ac cording to studies on the isotope of Yanshanian transformation granites and syntexis gr anits in combination of their matter settings and geological charaterteristics, t he paper holds that their matter characteristics mainly depend on the amount of the matter inherited from various ter rances especially the basements and inherited from the same terran ce.Terrances and their mesozoic tectonic environments of magmatism are the main factor that explains the inheritance mechanism.