Abstract: Graphene is a new found carbon material and has attracted great academic interests because of its perfect structure and excellent properties. The modification of graphene and/or graphene oxide and their utilization in the fabrication of nano filler/polymer composites with different polymer matrices have been explored by various methods and extensively studied. Compared with pure polymer matrix, the nano filler/polymer composites can become multifunctional with the adding of graphene. The resultant nano filler/polymer composites exhibit enhanced mechanical, electrical and thermal properties as well as improved processability, which can be applied in various fields. Herein, the preparation, structure and properties of graphene/polymer composites are summarized in general and the outlooks of future development were also discussed.