Titanium (Ti) and Ti alloys have been the main clinical application materials for bone and dental implants due to their excellent mechanical properties and good biocompatibility. However, it is not easy to achieve rapid osseointegration with surrounding bone tissues because of the biological inertia of titanium materials. Therefore, the biological activity of implant surface is further required. Hydroxyapatite (HA) is the main inorganic component of human bones and teeth, which has good bioactivity and biocompatibility. But restricted by its own brittleness, HA is often used as a coating material to cover the surface of Ti substrates to improve the biological activity of implants. However, the problems of weak bonding strength between coating and substrate and poor mechanical stability of coating have been the main factors limiting the wide clinical applications of HA coated titanium implants. From the aspects of coating structure, composition and preparation method, the research status and development trend of improving the interface bonding strength between Ti substrate and HA coating at home and abroad are summarized, which could provide a reference for the preparation and application of high-performance titanium implants.