Objective　Through constructing an online question database of medical physics

teachers and students can make use of the Internet to realize interaction in or after class

so students' ability of independent learning and the quality of teaching can be improved. Methods　Based on teaching outlines

the type

quantity and difficulty of the test questions were discussed and determined by teachers in the teaching and research office

and the online question database of medical physics was constructed with the help of Internet platform to realize self-testing and teacher-student interaction. Results　Through the construction and application of online question database

students' learning initiative was mobilized

the effectiveness of teacher-student interaction was improved

and empirical materials for teaching formation evaluation were obtained. Self-examination and teacher-student interaction help improve students independent learning and problem solving ability. And data generated on the platform enable teachers to know students' learning situation and their teaching quality. Conclusion　The construction and application of Internet + digital online question database of medical physics can greatly promote the teaching effect.