Abstract: With the rapid development and technological breakthroughs in the synthesis of graphene on a large scale at low cost, the commercial application of graphene materials has been arousing great interest from both academic and industrial fields. We review the latest research progress on graphene/polymer composites, focusing on their mechanical reinforcement, improvement of electrical and thermal conductivity, corrosion resistance, and flame-retardance. The current situation regarding commercial graphene products is summarized, and the main problems and future development of graphene/polymer composites are discussed.