Swell waves increase the maneuvering difficulty and navigation risk for ships entering and leaving the port.It is of great significance to study the effect of propagation of wave on ship maneuvering，especially for swell waves in harbor areas.This paper constructs a wave-current coupling mathematical model based on the unstructured triangular grid，and studies the propagation characteristics of swell waves and law of wave-induced current generation in the near sea of Dongjiakou Port. The results indicate that the significant wave height declines more than half as the swell spreads from the open sea to Dongjiakou Port and larger initial wave height clarifies higher attenuation rate.The swell in the ESE direction is more difficult to attenuate which explains the reason why the large waves mostly occur in this direction. The wave-induced current under the low tide is larger than that under high tide and would be strengthen by the wave height.The wave-induced current in the ship working area is generally within 0.1 m/s，which is about 5% to 7% of the maximum tidal current. The effect of swell on the ship’s motion in Dongjiakou Port area mainly comes from the direct action of the wave on the ship’s hull，and the effect of the wave-induced current on the ship is small and generally negligible.