This study aims to explore the vascularization of hydroxyapatite/tricalcium phosphate (HA/TCP) biomaterials implanted in mice during osteoinduction. The HA/TCP biomaterials were implanted in muscle of mice, and 2, 4, 6, 8, 10 and 12 weeks after the implantation, the materials were harvested to prepare serial sections and hematoxylin-eosin (HE) staining. The process of vascularization was dynamically described, and the area percentage of neovascularization was quantitatively analyzed. The results showed that neovascularization formation was a continuous and dynamic process. The neovascularization appeared largely in the first two weeks, with a rising trend in week 4, reached peak in week 6, and gradually reduced in week 8. The results provide ideas for improving the success rate of bone tissue engineering, and indicate the mechanism of osteoinduction.