In order to reduce the accidents from collision between ship and bridge, and improve the navigation safety of the bridge area of water, we carry out real-time detection and tracking to the moving ship of the bridge area of water based on the object detection arithmetic and by the AForge.NET toolkit design, forecast the course of a ship according to the navigation contrail of the moving ship, estimate whether the ship is facing the danger of bridge collision, and then take relative forewarning measures. The test in Bengbu of the mainstream of the Huaihe river in Anhui province proves that and the detection effect is satisfactory and can provide availability and feasible proposal to the active forewarning of the bridge anti-collision of the bridge group in the river of advanced channel.