Industrial Revolution in 18th century, and its following economic boom, caused turmoil and chaos in large cities. The construction of new towns has evolved with various titles in search of utopian ideas in order to solve problems and disorders of megalopolises. In the twentieth century, cities around the world, demonstrated different experiences in this case. This experience in Iran, both before and particularly after the revolution is impressive. Construction of industrial, organizational and administrative towns before the revolution, and 18 new satellite towns in the 70's to pull the population surplus of megalopolises, is a clear example of this. Based on existing researches, most of the Iranian new towns are dormitory areas at present, and are far away from the forecasted demographic horizons. One of these towns is Sadra New Town, situated in 15Km North West of Shiraz and its construction was begun considering a "green-cultural” role for it. Despite the predicted population of 200 thousand people in the demographic horizon of Sadra, the town has a population of less than 10 thousand people at present. This study with a focus on the documentation and library studies, field studies and using the spss software tries to analyze the factors and parameters affecting the population pull of a new town. Accordingly, the study recognizes the factors such as low-cost housing, sustainable employment, transportation and proper distance, proper and sustainable urban equipments and infrastructures, security, identity, recreation facilities and green spaces, more important than other factors in population pull of new towns, and after analyzing the barriers of population pull in Sadra according to these factors, proposes some solutions for population pull and stability in this new town.