Abstract: This article applies the DGS to the design of the microstrip power equalizer. The paper compares and analyzes thecharacteristics of the resonator cell before and after loading the DGS in the equalizer and the influences of the DGS parameters onthe performance of resonator cell, and then design a microstrip power equalizer with DGS. The microstrip power equalizer with DGScan measure more and expand the bandwidth, so you can use less resonator cells to achieve a wider equalizer network, ensuring theminiaturization of the equalizer, providing a new structure to the design of the microstrip power equalizer.