This report is analysis on the constitution of Bangladesh, 1972 and its impact in Legal History. Commonly it is recognized to us that constitution the supreme as well as basic law of a country. Therefore a constitution is, there fore, principle design of the structure and powers with the government and the rights and responsibilities of its residents. There can possibly be no state with not a constitution. Sometimes the constitution of a state is definitely formulated inside a document or docs; sometimes it is situated in an established entire body of rules, maxims, traditions and practices as per which its federal government is organized as well as powers are worked out.