Abstract As the title indicates, this page has sought to learn about the principle of separation between the three authorities in the Jordanian constitutions and compare between the Jordanian Basic law of 1928 and the Jordanian Constitution #3 of 1947. This principle embodies the forms of democratic government. The page has also touched on the principle of separation of authorities in terms of advantages shortcomings and rationale. The paper has concluded how important the reinforcement of separation of authorities in the Jordanian institutions is the Jordanian lawmaker has sought To spell out this principle however, this acknowledgement of this principle in articles was closer to the absolute principle of separation them to flexible separation. This is despite the Jordanian government efforts and Principle practice, in both government and non-government Institutions to apply this Principle in the Jordanian political life in a relatively flexible manner that achieves the principles of cooperation and balance between the three authorities in the Jordanian Basic law. Keywords: Principle of separation of authorities, Jordanian Constitution, Jordanian Basic law of 1928 and the Jordanian Constitution of 1947.