Abstract: With the rapid development of marine aquaculture in China, mariculture tailwater emissions are increasing, which has exceeded the land and sea sewage emissions currently.Mariculture tail water has brought to serious marine environmental problems.Therefore, the remediation of mariculture effulent is becoming extremely important.The aim of this paper is reviewing the remediation efficiency of mariculture effulent based on in-situ and ex-situ phytoremediation by halophytes.The purification mechanism, purifying ability and weakness of application of phytoremediation are also summarized.And the development of the phytoremediation by halophytes are prospected as well.