Calligraphy plays an important role in human history and it has been exposed to many damages to the same extent. Dari Persian calligraphy has not been spared from these damages and has faced many ups and downs during its life. In the present research, calligraphy and its decisive role also investigating the different calligraphy and isolated writings used in the works of one of the Persian writers after the revolution, Reza Amirkhani is the researcher's main goal. After studying the published written works of this author and separating the words with different writing rules, he examined the differences, similarities and heresies of the handwriting used in the writings of Reza Amirkhani and in a structured classification, he made it conform to the approved handwriting of the academy. The purpose of this research is to investigate the different calligraphy of Reza Amirkhani's works based on the script of the Handwriting Academy, while there has been no research on the calligraphy of Amirkhani's works so far. In the end, the findings indicate that the spelling of some words in the works of Reza Amirkhani contradicts the principles of calligraphy Handwriting Academy and is in an obvious conflict. There is no discrepancy in her works, except for the separate writing of words and the fact that the spelling of some words is in conflict with the grammar of Handwriting Academy.