In The road construction evaluation and quality control of layers of road has been a continuing challenge for engineers. Soil compaction is an important characteristic for Quality control of layer’s of pavement. Suitable compaction of each layer increases the soil bearing capacity and reduces seepage and surface settlement. The best way to control soil compaction is non-destructive testing usually done at the project site. The least destroying of the place is the importance of this method. In this study, the dynamic cone probe method is discussed beacause of high-speed response, the least destruction and cost, and simplicity of testing in comparison with other methods. Tests have been done on the layers of base and subbase for 5 different types of soil aggregation and their results were compared with relative compaction obtained from sand bottle test. The results showed that there is rational relationship between the number of blow of dynamic cone probe for 10cm penetration (M 10 ) and corrected probe results (penetration index (DPI) and cone tip resistance (qd)) on the one hand and Characteristic of relative compaction of the soil on the other hand. Due to the soil aggregation influence on the results and obtained relationships, this influence is considered in the relationships by use of the the dynamic cone tip resistance to the average grain size ratio. So, the resultant relationships is independent of the type of probe and the type of soil and it’s aggregation. The power equation with a correlation coefficient equal to 0.89 showed the best relationships between dynamic cone probe test results and the soil relative compaction. Key words: Quality control, soil relative compaction, dynamic cone probe penetration index, cone tip resistance