A new high-speed scan probe is developed for optical coherence tomography system.The probe exploits resonant oscillations of a fiber cantilever with a gradient-lens.When it is actuated by one piece of piezoelectric bimorph through a driving signal with square voltage on resonant frequencies,it can perform one-dimensional scan for optical coherence tomography.A 2D position sensitive detector is used to record the scanning pattern simultaneously.Meanwhile,we eliminated the nonlinearity of fiber stretcher with software.With the fast scan probe used in OCT system,experiments on typical sample for en-face are carried out.Those preliminary imaging results are presented in the paper.The probe has many advantages,such as simple structure,flexible control and higher scanning rate and accuracy.