The basic characteristic of urban planning in Iran from the start, to the contemporary meaning of it, is its Top-down approach. This approach is based on central government policies rather than focus on needs, goals, the wants of citizens and the city facilities. This planning is provided according to the statements of central government as an invariable document and is communicated to urban managers in order to be performed. In the current concept of global competition, a well planned city should have the best quality of life for people in addition to effective efficiency and function. So that the citizens can play the effective and active roles in forming urban environment. Urban planning managers have tried different ways to participate people in urban affairs, but these ways failed as a result of Top-down approach. In this paper, we have tried to follow the approaches by means of which it would be possible that participial planning to become instituted in urban planning of Iran. Therefore, the main purpose of the paper is paying attention to new approach (CDS) with Down-top and local characteristic, to encourage the public participation in urban planning of Iran.The research method is descriptive-analytical, in which the public participation, participial planning and the importance of it in urban planning have been discussed and through describing the CDS approach, the goals and the process of provision of it, the role in the performance of participial planning, have been studied.As the result of this study, the City Development Strategy (CDS) approach is a participial process (real participation) that involves all of urban users of the whole society classes. In fact, CDS is a participial decision making where main purpose is the provision of urban sustainable development by means of creating social capacities to fulfill the public participation.