Abstract: Compared with those in other regions worldwide, the granites and volcanic rocks in southeast China show distinct characteristics of episodical occurrences, complex genetic types and formation processes, and close affinity with metallogeny. In the past 50 years, the diversities of granites and their temporal and spatial distributions have been gradually revealed. The diversities of the granites are due to different source rocks of crustal basement, different geodynamic settings and different degrees of crustmantle interactions. Because of the speciality and complication, the source rocks for the granites, tectonic settings of magmatism and related basic goelogical problems have not been clarified. The weakness of previous research on the granites and volcanics in SE China includes their genetic constraints affected by deeper geology and tectonic geodynamics around. The suggested research subjects related with Mesozoic-Cenozoic geology in SE China in this paper include: (1) A-type granites in three lower Nd model age belts; (2) distribution of four volcanic belts and crust-mantle interactions; (3) whole-rock Nd isotopes and zircon Hf isotope tracing; (4)granite structure.