Abstract: HA/BG bioactive coatings were sprayed on Ti6Al4V substrate by subsonic flame spraying, and Ti/G coating was selected as transition player to relieve the stress in the coatings. HA/BG bioactive coatings underwent crystallization treatment at 700℃. The structure of the coatings was decided by the particle size. With fine particle, porous coatings can be obtained whose structure is beneficial to the bonding of the coatings and the bone tissue. After the crystallization treatment, the main phase of the HA/BG coatings was crystal HA, and the addition of fine active glass inhabited the growth of HA crystal. The compression stress exhibiting in HA/BG coatings was positive to improve the bonding strength of the coatings.