Orthopaedic implants in the body brings a high risk of microbial infections. Infection is one of the main reasons for failure of implant in department of orthopaedics, and is more common in open fracture surgery. Fracture nonunion after internal fixations is not rare clinically, and reoperation or even multi-operations are required, which will be a heavy burden for the patients physically, mentally and economically. The aggregation and activation of macrophages can increase the cell count around the implants, which improves the immune function of the implant/tissue interface, thus contributing to prevention or treatment of infection. In addition, surface modification of titanium and its alloys, and loading antibiotics or bioactive substances also play a role in prevention or treatment of infection and nonunion. This review summarizes the current research on anti-infection function and fracture healing promotion in the surface modification of titanium and its alloys, so as to provide references for designing orthopaedic implants with anti-infection and fracture healing promotion functions.