The marine environment is one of the most important animal and plant ecosystems, which provides a part of the food needs of human societies. Ensuring the health of this ecosystem is essential and directly affects human health. One of the pollutants that affects this ecosystem is oil pollution entering the sea. Due to the fact that there are a large number of natural oil reservoirs in the seas and a large part of oil transportation is carried out through the sea, this ecosystem is highly exposed to oil pollution. The pollution of the sea with oil has caused serious damage to aquatic life and, as a result, the food cycle, which ultimately ends with humans, and every year in the world, it imposes large economic costs to societies. This environmental limitation is increasing rapidly. The country of Iran is connected to the sea from the north and south and has kilometers of coastline and is one of the oil-rich countries, the exploration, extraction and refining of oil has aspecial importance in Iran. Also, the South Sea is one of the important transportation routes. So, the pollution of the marine environment by oil has a particular importance in this country. In this article, the phenomenon of oil pollution of the sea, its sources, the environmental effects of this pollution and the ways of its control have been studied and useful content have been collected for experts in this field.