Coal was the main energy source in China, but the emission of sulfur oxides, nitrogen oxides and carbon dioxide from coal-fired flue gas had been a serious environmental problem. Molecular sieve was widely used as the adsorbent in the removal of gaseous pollutants for its excellent characteristics such as cheap and easy to obtain, a widely range of application, and could be recycled. Another character of the molecular sieve was the highly sensitivity to water which affected the removal of pollutants greatly. The effect of water on the removal of sulfur from coal-fired flue gas by molecular sieve was reviewed in this paper, and the future research directions of molecular sieves were also discussed.%煤炭是我国主要的能源构成部分，但燃煤烟气中硫氧化物、氮氧化物和二氧化碳的排放造成严峻的环境问题。分子筛吸附剂由于其廉价易得、应用范围广、可循环使用等优点，被广泛应用于气体污染物的脱除。分子筛的另一特点是对水的敏感性很高，对污染物的脱除影响很大。本文综述了近年来水对分子筛在燃煤烟气硫硝碳脱除中的影响，以及未来分子筛的研究方向。
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