Taking the southern operating area of Lanshan port as an example, this paper analyzes the scheduling of ship’s entering the port in higher tide at the initial stage of the surrounding basin. There is a larger angle between the channel axis of the southern operating area of Lanshan port and the flow direction of mainstream of flooding and ebbing tides, resulting in a larger cross-flow in the channel near the entrance. The cross-flow during the flood phase is larger than that during the ebb phase. The largest cross-flow during the flood phase presents at 400 m along the channel axis outside the entrance. According to statistic results, the relationship between the maximum velocity during the flood phase and tidal range and relationship between the designed tide-bound water level during the flood phase and the maximum velocity during the flood phase is established and then water depth and cross-flow are calculated by inqurirying the tide table, so as to provide a scientific basis for determinating the time of ship’s entering port in higher tide, and thus achieve the goal of ship scheduling.