Persian language and writing changing time line in first Islamic centuries

Persian language and literature with different types of accents and communicating way faced with many change and challenges from Arab's entrance, with this fact Iranian were never forget their own official language even though sometimes they can make firm effects on the language of winner nations. We can divide Persian literature in first three Hijri centuries into three main parts: Arabic literature, Pahlavi literature and Dari literature. Dari literature: Dari is the political official and literature language in Islamic age. This language is developed version of north Pahlavi or Parthian Pahlavi. Language, with time mixing talked language Whit this reality in third and force Hijri centuries, Parsi languages development is in other of following literature Iranian independences approach from Samanian age.We can imagine that time as the start point of Parsi literature increasing level. the present text describes changing time line of Parsi language in first Islamic centuries present research wants to express and study the results of mixing Parsi and Arabic language in first three Hijri centuries after increasing Parsi level with utilizing revolving sources of Parsi language and writing alphabets in early Islamic age.