The cursive style of writing was popular compared to other writing styles and the cursive song poetry reciting the cursive style of writing was created in earnest during the Tang Dynasty. While no song poetry recited the cursive style of writing before the Tang Dynasty, a large number of poets recited the cursive style of writing as a poem during the Tang Dynasty, which must have been associated with its huge popularity during the Tang Dynasty. This study intends to review the situations of the cursive style of writing and the cursive song poetry during the Tang Dynasty and explore the relationship between the cursive style of writing and the narrative folk song based on its results. In order to conduct such analysis, this study extracted how many cursive song poems were written by examining a number of books such as QuanTangshi: Complete poetry of the Tang (全唐詩). This study selected a total of 35 poems by separately extracting poems which dealt with the cursive style of writing as a theme or were related only to the cursive style of writing among these poems on calligraphy. This study intended to analyze the narrative folk song of the Tang Dynasty under the hypothesis that the narrative folk songs mainly composed of free-style long and short lines played a leading role in the poems which recited the cursive style of writing during the Tang Dynasty, in that such a writing style was characterized by its free style. The narrative folk song whose form was free without any restriction to its width and length must have been the most appropriate poem in reciting what was related to the cursive style of writing with no fixed rules to its form.