Abstract: The dense asphalt road and hardened cement floor bring much difficulty to the archaeological exploration of underground urban site, while the traditional high-density resistivity method need to interpose electrodes, so it cannot be used to the urban environment. The capacitively-coupled resistivity method don't have to invade in the earth, through the special electrode consist a capacitor with the earth so that produces current, therefore, it's suitable for the conditions of urban hard surface particularly. In order to test the effect of capacitively-coupled resistivity method in archaeological exploration of urban site, we conducted the capacitively-coupled resistivity exploration in Wuyue seawall which located in Hangzhou main city area, and collected the electrical data contain multiple transmitter and receiver distance, then use the data for the inversion processing, finally, compared and analyzed the results of inversion and archaeological excavations. Indicating that the inferred results of resistivity images are consistent with the archaeological excavation results. The capacitively-coupled resistivity method is effective for archaeological exploration of urban sites and has broad application prospects.