Despite its low speed and high risk, the international marine cargo transportation, due to its large capacity, large capacity, low freight rate and strong adaptability to the cargo, plus its unique geographical conditions make it Become a major mode of transport in international trade. 80% -90% of China's total import and export cargoes are transported by sea. Due to the rise and development of container transport, not only the transport of goods to the direction of aggregation and rationalization, but also save the materials for packing goods and transportation and miscellaneous expenses , To reduce the cargo damage, to ensure the quality of transport, shorten the transport time, thus reducing the cost of transportation.