Nowadays, the contradiction between the designed capacity of lockage and the practical capacity in hydro-junction is becoming increasingly prominent. Therefore, this paper combines vessel flow characteristics with three-line rail traffic model in road traffic to solve this problem. Moreover, an organized model for hydrojunction lockage is set up based on the scheduling theory and cellular automata theory. Besides, by simulating the lockage system which consists of two-way navigation lock and ship lift, the pattern of the coming ships is studied to analyze its influences on the converging and diverging ship flow. Finally, a specific analysis is obtained through the simulation results.