The Bohai tidal wave system was numerically simulated by FVCOM(finite volume coast and ocean model). Data from 19 tidal stations along the Bohai Sea coast were used to verify the simulation results, which are in good agreement with the measured results. Based on this, the main characteristics of M₄, MS₄ and M₆ of three main shallow water tidal constituents in Bohai Sea were further studied and compared with previous research results. The results show that:the propagation characteristics of M₄ and MS₄ are similar, and there are 5 amphidromic points, one of which rotates clockwise, while the other four rotate counterclockwise; and for the M₆ tidal constituent, there are 9 amphidromic points, two are clockwise and the other seven are counterclockwise.The amplitude of M₄ component can reach 25 cm near the shore, which is about 10% of the amplitude of M₂, followed by the amplitude of MS₄, and the amplitude of M₆ is the smallest, which is only about 18% of the amplitude of M₄.The amplitude distribution of shallow water tides is closely related to the seabed topography.