Abstarct: One of the most important purposes of controlling DC microgrid is accurate load sharing among Distributed Generation (DG) units in islanded mode. Conventionally the droop control method is utilized to achieve current sharing among the DGs as a decentralized approach. The droop control faces with two limitations. Firstly, this method causes the converter output voltage deviation. Secondly, the line impedance effect is not considered in the droop control. Therefore, it is necessary to use a secondary controller to improve the performance of the DC microgrid control. The main aim of this thesis is to present a new distributed control method at the secondary control level in order to deal with the limitations of droop control. In this way, a DC microgrid is considered in which the distributed generation resources feed the load using a boost converter connected to the DC bus in the islanded mode. The droop control method is used as the primary control, according to the limitations of this decentralized approach, a secondary controller baxsed on the distributed control method is presented to improve the control performance of the DC microgrid. The results from the small signal stability analysis have illustrated that the DC microgrid is stable under load changes, droop coefficient variations, and various communication delays. The results of the DC microgrid simulation have shown that the proposed method has the ability to guarantee the current sharing accuracy and bus voltage regulation under both resistive loads and CPLs changes. The experimental results have proven the effectiveness of the proposed distributed control method. These results have shown that the proposed method can overcome the droop control limitations. Also, the laboratory test results have demonstrated that the proposed method has a proper performance under load changes and it can guarantee accurate current sharing among the DG units and bus voltage regulation in a DC microgrid.