OBJECTIVE: To study the effect of maxillary sinus floor lifting by bone graft for immediate implantation. METHODS: 10 maxillary sinus underwent sinus floor bone graft and 12 simultaneously implants placement. RESULTS: There were no implants loose or lost; X-ray examination showed well osseointegration and no maxillary sinustitus. Sinus floors were lifted 5-10mm, with a mean value of 7.5mm. All the implants placement had been repaired in 6 to 7 months postoperatively. CONCLUSION: Maxillary sinus floor bone graft with simultaneous placement of implant is predictable.