Introduction: The impact of PHC in providing and extending equity is valuable. To present the PHC role in health system, and providing some approaches to deal with its related challenges. 

Literature review: Alma Ata declaration is a valid document for defining principles and bases of PHC. In 1987 the PHC was accepted as a major key to achievement for Health For All (HFA)by the year 2000.But then it deviated from its principles. By entering to 21st century it was confirmed on its gentility and need to PHC to satisfying current problems and future healthcare needs promot- ing health, and achieving to equity in health. Also in 2003 declaration of WHO for 21st century and in United Nation Report for Human Development, and world heath report in 2008 the PHC is discussed and accepted. Governments are faced to some challenges to administering PHC includ- ing: human resource shortage , insufficient funding and equipment resources,….Some approaches are suggested for dealing these challenges as follows: to provide infrastructures, reorganizing PHC, reform in human resource training, to offer incentives and make coordination and transac- tion for all sectors of PHC personnel.

Conclusion: To provide and extend equity PHC is always a valuable strategy and to provide PHC it is necessary to pay attention to its principles, to appropriate human resource training, and to allocate more funds for heath sector.