Reasonable planning of the port’s gate number and road width is one of the key factors for ensuring the entire port consolidation and distribution system in the smooth transportation. At first, through researching the working characteristics of the port gate system and road transportation capacity, this paper analyzes qualitatively and gives theoretical formulas about the gate number and road traffic capacity; Then, using computer simulation technology combined with discrete event dynamic theory, queuing theory and traffic flow theory, this paper establishes the compound simulation model regarding to the number of the port gate channel and road width. Moreover, this paper carries out a simulation test on a practical case. The research method may serve as a reference for improving port’s planning and design level.