This article examines the pattern of political elite turnover in the second Pahlavi period and the mechanisms of entry, consolidation, and removal of the ruling elites Using the classical theory of elite circulation between 1944 and 1978. The main question of the research is how the pattern of elite turnover was formed during the reign of Mohammad Reza Shah, what mechanisms governed the selection and relocation of elites in the court, army, and bureaucracy, and what consequences this pattern had for the stability of the political system. The research hypothesis is based on the premise that after the 1953 coup, the concentration of power in the hands of the Shah and the weakening of political competition institutions led to the formation of a closed, person-centered, and loyalty-centered pattern of elite turnover; a pattern that contributed to administrative cohesion and apparent stability in the short term, but in the long term, by limiting the absorption of new elites and weakening the capacity for reform from within, it led to an increase in the gap between the state and society and the fragility of the power structure. The research method is historical-institutional with a descriptive-analytical approach and is based on the analysis of structural and functional developments in the main institutions of power in two sub-periods: 1320 to 1332 and 1332 to 1357. The findings show that elite blockage and personalization of power paved the way for elite displacement in the 1357 Revolution.