In the process of the ship crossing the channel, in order to prevent ship traffic conflicts caused by improper timing of crossing, reduce the risk of collision of the ship, established a model for the ship to cross the channel according to factors such as ship navigation environment and navigation status of the main channel, and used MATLAB software to program the model, through the quantitative calculation, the safety crossing time of the engineering ship is obtained. Finally, the established traversing model is applied to the actual case of the engineering ship crossing the main channel, and the factors affecting the transit time are analyzed. The example results show that the model can calculate a reasonable crossing time period based on the navigation information of the navigable ship, provide reference for the timing of the ship crossing the main channel, and adjust the calculation result by changing the relevant navigation parameters of the engineering ship through the channel.