The New Port of Qinzhou Bay is located in the water area of 100 000 tons east channel and 300 000 tons oil wharf which will be affected by the New Port plan in terms of channel flow and cross flow. The tidal current in the whole Qinzhou Bay was simulated via physical model test in an attempt to analyze the channel flow and cross flow in the new port plan. Test results revealed that among the three plans, velocity change in plan 1^# is the largest. Flow velocity in the channel of 300 000 tons oil wharf varies within 0.10 m/s; flow velocity in the east channel of west shoreline increases within 0.20 m/s. Since the main currents in the New Port concentrate in the 100 000 tons east channel, the influence on the flow and cross flow in 100 000 tons east channel will be larger than those in the 300 000 tons oil wharf channel. In plan 3^# in which the shoreline is smoothed, cross flow in the east channel reduced apparently. Therefore, the encircling plan is recommended.