Abstract: To comprehensively evaluate the risks of offshore platform oil spill in the Bohai Sea and establish an effective appraisal system, we screened and identified the underlying oil spill sources by means of the analytic hierarchy process.The extent to which oil spill may occur was also considered using a fuzzy comprehensive method.For these purposes, a probability model for predicting the oil spill risks was established by the combination of SINTEF blowout/kick database and DNV oil spill risk assessment model, and a working platform located in the Western Bohai Sea was exemplified.Building on the platform number and oil processing capacity, two models of F=5.7×10^-5Q^-0.3 and F=4.0×10^-4Q^-0.988 were set up for this platform, respectively.A total score of 41.6 implied a moderate level of oil spill risk.The risk assessment method can be utilized to effectively evaluate the degree and probability of offshore platform oil spill and consequently offer the important technical support during emergency response operations.