This study seeks to explore institutional history of Punjab Legislative Assembly 1947-55. Focus would be on evolution and building of this institution in newly formed country. Achievements and failures of the Punjab Legislative Assembly would be focused in the context of institutionalization. Three main indicators durability, autonomy and differentiation have been borrowed from Kevin T. McGuire’s and Huntington’s institutionalization and would be applied. Electoral politics in Pakistan will be analyzed because in the Election of 1950 many anomalies and injudiciousness committed will be brought into focus. Political dismemberment and instability in the Institution of Punjab Legislative Assembly which affected the social and economic process in early years of Pakistan would be evaluated. The study aims at to answer the main question, whether external or external forces are the main determinants of the performance of the Assembly. While answering the history of institutionalization in Pakistan from 1947-1955 would be explored. Moreover the interrelationship between Legislative assembly and other institutions of Pakistan such as bureaucracy, judiciary, and army would be examined. Much work has been produced to highlight the role of various institutions such as military, bureaucracy, political parties in politics of Pakistan but historian generally ignored the significant role of the legislature as an institution. Although in modern democratic scenario it is playing key role to protect and promote democracy.