The traditional maritime logistics industry is facing an industry transformation bringing by technology development. Along with industry transformation, the maritime logistics research field is also facing new challenges and opportunities. It is found that using simulation or optimization alone solving maritime logistics decision problems has some drawbacks. Instead, a trend of integrating the two methods is becoming more and more popular in recent literature. However, an in-depth and systematic literature review is absent. Thus, this paper reviews a number of 106 papers on the integration of simulation and optimization for the maritime logistics studies published in the recent two decades.