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The present invention refers to various unit process composite applied cleaning differential according to a particle size of at the earth-and-sand contamination so that the information can be the which can process the various nonflammable materials for forming a glass the earth-and-sand cleaning purifying method relates to a contamination, separating earth and contamination from waste buried and separated contamination based extractor extracts specified particle size earth and screening step, the washer 1 earth and contaminants selected a predetermined diameters of not reference back to the cleaning step number 1 screening, 2 earth and contaminants selected again cleaning difference number 2 wash step, the washer 2 the washer 3 earth and contaminants a predetermined diameters of not basis screening specified particle size selected and wash step number 3 least the pipe has curved to dewater characterized in that including step.