Abstract: Ecophysiology of intertidal zone is one of the most complex and important fields in the marine environment.Algae are unavoidable to suffer from adverse environmental factors such as dry out, temperature, salt and alkali and radiation during the growth, development and reproduction.It is especially serious for alga Ulvaceae in the intertidal zone.In this paper, the research on physiological and biochemical characteristics, and resistance mechanism of Ulva species under the influence of abiotic stress factors such as high temperature, dry out, light, nutrient and heavy metals are reviewed, and the problems in this field in further are discussed.