Abstract: The anisotropic diffusion (AD) algorithm was used to preprocess the OCT images for noise reduction and edge enhancement, then the phase congruency (PC) algorithm was added to improve the edge characteristics extraction, and finally Butter-worth highboost-filter was appended for further edge details enhancing and noises clearing up. The novel combinations of the three algorithms were applied to the two different OCT images processing, the experiment results showed that effective noise suppression, clear outline extraction, and characteristics enhancements were realized.