What attracts the increasing number of scholars’ attention was that the innovators were often not the biggest beneficiaries of technological innovation. Teece came up with the concept of complementary assets to solve this problem, after which complementary assets have gradually become the hot topic of scientific research. This essay summarized the definition, classification, measurement of complementary assets as well as the relationship between complementary assets and innovation and commercialization that was proposed by scholars at home and abroad. At the same time, a brief view of current research situation of complementary assets was made. In the end, some thoughts on the further development of complementary assets were presented.