Al -Hawi in medicine is considered one of the most important books of Abu Bakr Al -Razi, and he was described as a great encyclopedia in medicine that contains many summaries of Greek and Indians in addition to his accurate observations and special experiences. Al -Hawi was translated from the Arabic language into the Latin language and printed for the first time in Bricia in northern Italy in general 1486 It has been repeatedly reprinted in Venice in the sixteenth century AD, and Al -Razi's skill in this huge author is evident and almost the historians of Al -Razi gathered that the book was not completed by himself, but his disciples were the ones who completed it.