Tusi had important role in formation and revival of Shia jurisprudence and law. since that his time was coincidence with the burning of the great books and library, nearly he must to revive the hadith and jurisprudence in a way. He innovated in the sphere of jurisprudence. He tried to defend the application of jurisprudence in respect of religious laws. One of his accomplishments was that he could be successful in propagation and coherence of methodologies of argumentation and inference. His dominance was unrivaled until long Time. Nearly all jurisprudents only were affected by shaykh Tusi's opinions. The influence of shaykh Tusi continued until the emergence of Ibn Idris Hilli who criticized some views of shaykh Tusi. Also Tusi Had given to shaykh Mufid a definite formulation in Ijtihad. In fact three people including Shaykh Tusi had important role in leadership of Shia's school of law. Some works of Tusi shows that he was influenced by precedent jurists like Sallar Deylami.