The purpose of this research is to investigate a part of the study of writer Yun Bokjin who is the most famous children’s song writer in Korea during the Japanese colonial era and the period of emancipation. To study Yun’s children’s songs we have to research about the bibliographies of papers and magazines from 1920s to 1950s when he defected to North Korea, for the first time. And then, we will have to survey about the music collections of children’s songs, for example, Yun Bokjin himself(윤복진), Park Taejun(박태준), Kang Sinmyeong(강신명), Hong Nanpa(홍난파), Park Taehyeon(박태현), Na Unyeong (나운영), and Sin Gosong(신고송) who composed the music books based on Yun’s children’s songs. The reason why is so many Yun’s children’s songs were there which is <Jungjungttettejung(중중떼중)>, <Yangyangbeombeogung(양양범버궁)>, <Footprints of Waterbird(물새발자옥)> and <Selected 300 Pieces of Music for Children’s Songs(아동가요곡선 300곡)> etc. In this research, the most difficult matters are the absence of the research data. Not only the Japanese colonial era but the emancipation period, lots of research data are missed. So, I have to survey so many parts of the papers, magazines and music books. The next thing is to confirm the secondary materials about the Yun Bokjin, children’s songs, children’s literature, and almost the whole Yun’s writings. In the future, the more literary materials about Yun Bokjin will be found then the more deeply we can research the Yun’s whole literary works.