This work presents a forced vibration experimental system for a tuning fork based on optical micro-displacement measurement，integrating two classical optical measurement techniques:the optical lever method

and the Michelson interferometric method． Firstly，the fundamental principles of optical micro-displacement measurement and its high sensitivity characteristics are introduced，emphasizing the real-time response advantage of the optical lever method in angular displacement measurement and the high resolution and quantitative capability of the interferometric method in translational micro- and submicron displacement measurement．Subsequently，these two methods are applied to the dynamic study of forced vibration in a tuning fork，where the resonance frequency and quality factor are obtained through frequency scanning．experimental results demonstrate that the optical lever method features a simple structure suitable for dynamic monitoring of vibration patterns，while the Michelson interferometric method provides more precise amplitude quantification and frequency response data． Their combination enhances the comprehensiveness and reliability of the measurement．This experimental system not only improves the intuitiveness of vibration dynamics teaching but also provides an excellent platform for students to master optical measurement techniques and data analysis．Future work may integrate modulation-demodulation and electrical detection methods to further expand the depth and breadth of experiments，promoting innovation in the teaching of mechanical vibration and precision measurement．