Arbuscular mycorrhizal (AM ) fungi can enhance the uptake of nutrition of plants, promote the stress resistance of plants, improve the micro-ecological environment of plant rhizosphere, and reduce the poison of heavy metals to plants, influence the uptake and transport of heavy metals by plants, thus have great application potentials in the phytoremediation of metal-contaminated soil. In recent years, arsenic (As) pollution of soil has become into a major public concern in many countries and the bio-remediation of As-polluted soil has become a hot research topic. This paper reviews the research advances of AM in remediating As-polluted soil from the aspects of AM changing soil pH and enzyme activity, enhancing As resistance of plant and impacting As uptake, and also discloses the application potentials and research directions of AM in As-polluted soil.