Different transportation methods have different impacts on transportation costs. Generally speaking, the cost of air transportation is the highest and the cost of water transportation is the lowest. This is related to the carrying capacity, fixed costs and variable costs of each mode of transportation. Air transportation purchases of aircraft and other related equipment account for a large proportion of transportation costs. In this way, the annual depreciation of fixed assets of transportation equipment is very large, and the salary of airport operators is also very high. Therefore, the fixed air transportation High cost. However, the weight of each aircraft is very small, so the fixed cost per unit of transportation is also very large. Although the cost of purchasing ships and other related equipment for waterway transportation is also very large, the annual fixed asset depreciation cost of transportation equipment is also large, the salaries of related operators are also high, and the fixed costs are also large. However, the shipping capacity of waterway transportation is very large, so that the fixed cost per unit transportation volume is reduced.