Based on the observation of the current at several stations conducted synchronically in winter and summer respectively in Lianyungang nearshore area, the variation of residual current is analyzed with different seasons and tidal cycles. Results show that the magnitude of residual current is increasing gradually from north to south. The direction of residual current is mainly toward southward in Haizhou bay, while the regularity of the direction southward the port area is poor owing to the effects of topography and runoff. The magnitude of residual current exhibits four varied types, and the direction of residual current exhibits two varied types. The magnitude and direction of the upper residual current are different from that of the low layers in summer, while the vertical distribution of residual current is relatively uniform in winter.