This paper brings in the computing formula of marine environmental capacity based on the theory of market value method,then revises the formula by introducing coefficient of marine industry,at last establishes the model which can evaluate the loss of marine capacity oil spill makes.The paper works out the loss that the ConocoPhillips oil spill event created is 8.65billion,which is more serious than the Mexico Gulf oil spill event,the paper also analyses the Bohai sea ecological environmental damage that the oil spill event made.At last this paper put forward suggestions to deal with oil spill which include perfecting the oil spill evaluating model 、establishing compensation funding of oil spill、reinforcing the establish of oil spill emergency system and perfecting the law.