Abstract: To make more rational and scientific decision in case of emergency, effectively control the spread of any spilled oil, and reduce the environmental pollution caused by oil leakage, this paper organically integrates the leakage prediction model of quantitative risk evaluation technology, fluid diffusion model of environmental sensitivity analysis technology and experienced algorithm of oil leakage and diffusion rate under specific environment abroad to set up a model which can be used to predict leakage under different leaking patterns in storage facilities in terminals and main pipeline, diffusion track of oil spilling and oil head position corresponding to each time period. The results have provided effective guidance for selecting spilled oil containment points and recovering oil. The technology enables the emergency supplies preparation and surrounding emergency power allocation to be more rational and scientific, and is therefore significant for preparing the emergency plan and the emergency command on site.