The utility model provides a large-size non-contact platform-type scanner comprising a one-dimensional scanning mobile platform, a two-dimensional camera bearing stand and a light source rotation bearing stand. The one-dimensional scanning mobile platform is used for bearing an object for scanning. A table top arranged in the horizontal direction is mounted on a frame. The table top can move transversely and linearly in the horizontal direction. The two-dimensional camera bearing stand comprises a vertical lifting stand, a longitudinal translation stand and a camera and can drive the camera to translate in the vertical direction and the longitudinal direction. The light source rotation bearing stand is formed by arranging a light source supporting plate capable of moving vertically and transversely on the vertical lifting stand. The two ends of the light source supporting plate are each provided with one light source base capable of rotating around the longitudinal axis. A lamp tube is arranged at the center of each light source base. A lamp cover is fixed to the edge position of each lamp source base. The large-size non-contact platform-type scanner does not stretch and tear manuscripts during scanning and can furthest protect the manuscripts of cultural relic. The large-size non-contact platform-type scanner is large in scanning size and high in precision.