Abstract: Based on the unstructured system, the finite volume method of tide and tidal current in the sea area of Caofeidian was established. The tidal current numerical simulation results agreed well with the measured values, and the hydrodynamic data was provided for the oil spill model to predict the influence of oil leak accident caused by ship collision at the interchange area of ship channels. In this paper, the adverse effects superposition of wind field and current field was coupled, the maximum drift distance, sweeping area and transport trend of oil slick were analyzed in detail.