An interdisciplinary experimental teaching method for replacing traditional planar mirrors with newmaterials is proposed for optical resonant cavity experiments in laser principle.Using prism type rellective film,which is often encountered in people’'s daily lives in the field of transportation, in the experimental process.0nthe one hand, it can stimulate students’ interest and improve their innovation awareness ; On the other hand, thematerial’s strong reflective efect and anti-reflective performance effectively overcome the disadvantages oldifficult and time consuming debugging of planar mirror resonant cavities.By comparing the debugging processand experimental results with the planar mirror resonant cavity, we can cultivate students’ inter disciplinary abilities and greatly improve the effciency and quality of laser principle experimental teaching.