In order to improve SAR image oil spilling information extraction precision, and to solve the problem that a level set DRLSE model cannot correctly extract oil spilling information from a multiplicative noise-containing SAR image, the invention provides a level set SAR oil spilling extraction method based on bilateral filtering. According to the method, an oil spilling SAR image is filtered by using a bilateral filter; constructing a DRLSE model energy function E (Phi) based on bilateral filtering; energy minimization is carried out on a DRLSE model energy function E (Phi) based on bilateral filtering; and SAR oil spilling information is extracted by using an E (Phi) energy minimization equation F. According to the algorithm, a bilateral filtering function is introduced into a level set DRLSE model energy function, an evolution equation after the energy of the energy function is minimized is used for conducting evolution operation on the oil spilling SAR image, the influence of multiplicative noise on the level set evolution process is reduced, and meanwhile important information such as the oil spilling edge is well reserved.