This study discusses vibration characteristics ofscanner platform on the photocopier. We use finite elementanalysis software to simulate the modal shape and naturalfrequency. Major components of the scanner platform aretwo mirrors spring steel and frame, and bottom of thescanner platform is fixed on the track by the magnet. First,we proceed the modal analysis about the frame. Accordingto the results, part of the modal shapes of frame makemirror to move. In the analysis of the scanner platform,we use the elements of mass and spring to replace theoriginal contact elements, because it exert the precompressstress on the mirrors to fixed to the frame by thespring steel. And then, we analyze the effects of naturalfrequency and modal shapes by setting the differentpre-compress stress, and discuss the factors that affect theangle and displacement of the mirrors. Future, the analysismodel will be applied to improve the vibration of themotion platform on the photocopier scanner.