This paper is a part of study on monk calligrapher and poetry of monk calligrapher who were engaged in activities since the beginning of Tang Dynasty. Since I can not deal with all the poems on calligraphy and monk calligraphy of many generations in one short essay, I first selected and analyzed Cursive song poetry on the Huai Su's Cursive style of writing. Among the numerous monk calligraphers, Huai Su's calligraphy and poetry created by contemporary poets have been passed down to the present day, and since then Huai Su is represented as a typical monk calligraphy. Since the date of birth and entire life of Huai Su was not even clear yet, in the first chapter, I tried to summarize the life of Huai Su. And in the next chapter, I selected and analyzed 13 pieces of Cursive song poetry on the Huai Su's Cursive style of writing in Tang Dynasty, and 15 pieces of that in next many dynasties. Based on this, I summarized the poetic characteristics of Cursive Song Poetry on the Huai Su's Cursive style of writing of many generations in four areas such as title, form, content, and expression technique.