| With the fast development of the activities of industry and agriculture, the globe environment quality is under more and more threat, so the environment protection has been a big social problem. As the link of sea transport and land transport, ports lead to a certain extent of bad effect for their water area and urban environment. In special, as one of the main ambulatory pollution sources, ships have a great influence on port water area and air environment, even ports sustainable development.The theory of Externalization has a wide application on the field of environment management; especially the research on internalization of external cost becomes a guideline of environmental pollution control. So it is essential that use the theory to control port pollution and improve port environment quality through economic measures.This article extend the theory of externalization to routine pollution control of ships operation in ports, analyses port pollution arose by ships operation, makes policies of pollution control which aims at the characteristic of ships pollution. With the study of external diseconomy conduced by ships operation in port, the article analyses the externalization type and harm of ships pollution, finally put forward corresponding control measure, hope to provide academic reference for relevant parties to control pollution.The main work of the article is the following: 1) analyze some kinds of ships pollution in ports and points out the blights, then introduce the theory of externalization and expatiate ships pollution lead to loss of market efficiency; 2) provide the policy of pollution charges to control ships routine pollution in condition of government intermeddle into the port pollution control; 3) build the model of port - ship system income and illustrate to prove the reasonability of pollution charges for win-win strategy; 4) discuss the feasibility and necessity of ships pollution charges, and advance the combination policy of pollution charges policy and port environment criterion for control pollution of domestic ports, then put forward a simple model to calculate pollution charge per ship based on ship type,... |