Optical coherence tomography （OCT） has become an important non-invasive three-dimensional imaging technology with a wide range of applications. Novel demands have occurred for the OCT technology due to the developing application scenario requirement， such as resolution improvement， depth-of-focus decoupling， aberrations correction， and anisotropic resolution correction. Over the past decades， computational imaging methods have been demonstrated effective in improving previous performance parameters. This paper focuses on the four performance improvement demands and reviews several representative computational methods. The analysis compares the strengths and weaknesses of respective solutions and outlooks future trends of computation-enhanced OCT technology， with the aim to provide references for the further study and its applications.