The study includes three sections; The first section deals with the biography of Al-Samhudi his name ,ratios ,birth ,scientific life, writings and his death.The second section presents the content of the book Wafaa Al Wafa according to the writer's order to the chapters of the book .The third section points to Al-Samhudi's approaches in writing the biography of the prophet Mohammad (pbuh) which he started it with the prophet's relationship with the people of Al-Medina, when the prophet introduced himself to Arab tribes, in al-hajj seasons, amony them Al-Aus and Al-Khazrag.He continued presenting the biography of the prophet Mohammad(pbuh) till his death.Finally, the study ends with the conclusions that study finds out.