Triple Junction is the point where the boundaries of three tectonic plates meet. At the triple junction, a boundary will be one of the 3 types (a ridge, trench or transform fault). The earliest understanding of triple junction is based on the tectonic plate. Since it is especially important tectonically, we can get better and deeper understanding about tectonic plate through the study of triple junction. Different shape or type of triple junction can indicate different tectonic environment and movement history. Meanwhile, it has significant impact of oil and gas resources. This thesis discusses the evolution of the concept of the triple junction, the type, identification, evolution, and simulation of a quantitative description of progress. And oil and gas resources effect has also been analyzed. Finally, the research of the triple junction is predicted.