This paper is planned to discuss children`s literary works by Kim Hae-gang, which have never been reviewed to date. Kim Hae-gang was a poet who had been active throughout his life since he began writing in 1920. Although he was a poet, he wrote children`s poems expressing sorrow for the reality in which children of the colony lived. His works belonged to children`s literature in the proletarian group, which haven`t been discussed seriously as of yet. In this regard, he is a poet who enables us to confirm the early appearance of a Korean children`s literature history. Kim Hae-gang presented his children`s poems mainly in 「Byeolnara」 and 「Sinsonyeon」. He had close friendships with the editors of the magazines; thus, he exchanged letters while expressing resentments about colonial conditions. Also, he maintained a close relationship by the medium of the sense of kinship in terms of their status in engaging in the same teaching job. He presented poems reflecting a strongly critical propensity concerning reality from the time he started his literary career; yet, he wrote children`s poems based on the innocence of childhood. He named the innocence of childhood ``the nation of pure love``, and adopted a strategy of detouring reality unlike other poems. Thanks to that, his children`s poems were able to ensure lyricism compared to works by poets in the KAPF group, who personally had a close relationship with him. Instead of directly coping with the ordinary life of poor colonial reality, he considered the objectivity of children`s poems and tried to propose the hope of the future by fully utilizing formal characteristics. That was concretized primarily by the emergence of the image of the sun, and this stemmed from his faith in maintaining coherence in a topic through the extension of an image found here and there in poetic works.