The invention relates to a cleaning smelt device and relative cleaning method, wherein the cleaning smelt device comprises a support disc and two clampers, while the support disc supports work-piece, the clamper comprises a fixed element, several clamping devices and an adjusting element, the clampers are distantly mounted on the fixed element to clamp the work-piece, and the adjusting element can adjust the arrangement of the work-piece to adjust the clampers. The inventive cleaning method uses the cleaning smelt device to clean the small round work-piece of optical lens, to avoid hurting work-piece.