This study presents revision scheme of Korean Decimal Classification appropriate for classification of children-related materials, mainly centered on general works and literature occupying the majority of children-related materials in school libraries. Towards this goal, I have studied the development and use of classification system for children-related materials available in domestic and overseas school libraries or children’s libraries, and researched elementary school 4th, 5th, and 6th grade students’ degree of understanding on classification item terms and children-related materials terms used for KDC’s standard divisions, literature form divisions, general works, and literature. Based on the results of analysis, I have presented revision scheme of Korean Decimal Classification item terms and class numbers for children-related materials.