Considering the budget allocated, national civil projects may cause the spoilage a huge part of national capital of corruption. This article which is the conclusion of a research -descriptive, and explorative- deals with economic corruption in various phases of national civil projects, and the researcher tries to recognize the bottleneck of economic corruption in various phases of national civil projects. the method of corruption manifestation therein considering the experts of this field. The question of this research was analyzed based on a well-structured Interview. In general, the main bottleneck of economic corruption in civil projects was located in planning, and designing the project. From among various economic corruptions, the following cases were more common: Collusion in governmental transactions, unfair exertion of influences, illegal acquisition of assets specially by employer, contractors, consultants, and supervisors, giving bribe to influential persons for winning projects, Ignoring the defects, approval of statements and unlawful possession of governmental assets, and properties. Moreover, the most important indications, according to Interviewed persons, are as below in respect of general factors paving the ground for economic corruption: Weakness, and Inadequacy of the quality of supervising investments, the government's monopoly in economy, cultural, and social fields and reasons, Legal structure of governmental system, weakness of supervisory systems, and penal justice.