In order to improve the efficiency of oil spill detection with wavelet analysis according to SAR image, a 2-D self-adapted scale and wavelet construction algorithm is designed. The self-adapted two-dimension scale function and wavelet is constructed according to oil spill SAR image with the construction algorithm. Original oil spill SAR image is processed with the constructed self-adapted scale and wavelet. The oil spill range is extracted exactly. In the SAR image procession, the scale and wavelet is correlative with the learning SAR image. In accordance with different learning image, different suitable scale and wavelet can be constructed self-adaptively, and multiresolution is avoided, the SAR image procession can be in real time.