Using waste glass as the aggregate， NaOH and NaCl as sources of alkali metal ions， the influence of alkali ions on alkali-silica reaction （ASR） in glass mortar was studied through the dissolution of glass and the reaction of alkali aggregate in glass mortar. The results show that the dissolution rate of glass increases with the increase of OH^— concentration in the solution， reaching a peak when the OH^— concentration is 1.000 mol/L， and then decreases. In NaOH environment， the expansion rate increases with the increase of NaOH concentration， and decreases with the passage of time. In NaCl environment， expansion mainly occurs in the early stages of erosion. In the coexisting environment of NaOH and NaCl， the expansion ratio and expansion speed both increase significantly， and the expansion rate increases noticeably in the later stages of erosion. The increase of NaOH concentration and the addition of NaCl both lead to an increase in the gel sodium-silica ratio in ASR gel， which increases the gel’s water absorption and swelling properties， ultimately exacerbating the expansion.