Currently, repair of infectious bone defects is still a clinical serious challenge. Here, a heterojunction coating of niobium oxide on pure niobium surface by using microarc oxidation and hydrothermal treatment was prepared. The results showed that the obtained heterogeneous junctions exhibited synchronously enzyme-like and ultrasonic dynamic properties triggered by ultrasound treatment, especially in acidic microenvironment of mimic bacterial infection. Under these key conditions, oxidase-like activity of the heterogeneous junctions was enhanced, generating several reactive oxygen species which can kill bacteria and remove their biofilm, with inhibition and clearance rates were 98.57% and 91.43%, respectively. Under simulated physiological conditions, ultrasound enhanced antioxidant-like enzyme activity of this kind heterogeneous junction, thereby scavenging reactive oxygen species, alleviating oxidative stress, and promoting proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells (rBMSCs). In conclusion, the obtained niobium-based coatings with sonodynamic and enzyme-like activities have profound potential application prospects in infectious bone repair.