Based on vibration messuring principle of blade tip-timing, fiber-optic bundle sensor used as blade tip-timing is designed. Theoretical derivation is done to the analyzing method of synchronous blade vibration by using speed-vector-end-tracking method,and so is the computer simulation to measurement process. The method is applied on a certain model of aerial equipment to do simulation experiments whose result is similar to theoretical model,and the amplitude measured is in accord with the result of strain gauge in general.