Abstract: Fly ash is a kind of industrial solid waste whose major component is crystal aluminum-silicate.Synthesizing zeolite from fly ash is a development trend for high-value application.The alkali-activation of fly ash is an important way for synthesis of zeolite.The dry and wet technologies of alkali-activation of fly ash for synthesis of zeolite were summarized.Current study situation，characteristics，and reaction mechanism of hydrothermal process，high temperature fusion followed by hydrothermal process and alkaline molten-salt process were researched，respectively.The factors，such as NaOH（alkaline activating agent），ratio of SiO2 to Al2O3，and calcination conditions，were also studied and analyzed.

Key words: fly ash, zeolite, synthesis, alkaline activation