Objective　To explore the PBL mode in training students' ability

improve the quality of teaching effect， in the teaching of Clinical therapeutic ultrasound and the teaching method based on problems with discussion method. Methods　To 31 subjects of study who were randomly divided into five groups， each 6 people， a PBL teaching mode was used for 12 periods by proposing and study， group dis-cussion， the whole class exchange and commenting on summary. Results　The survey shows that 93.6% students think the teachers' design has gained their ends，71% students are impressed by the knowlege and 96.8% of the students show the good learning attitude， 64.5% of the students raised their interest in learn-ing， which shows teaching results are effective. Conclusion　PBL mode is superior to LBL teaching mode in training students' ability， improving the quality of teaching effect.