Abstract: Ultraviolet spectrophotometry was used to analyze the effects of temperatures, light, pH and sucrose concentrations on the stability of anthocyanins. In order to improve the stability of anthocyanins, the process formula of anthocyanin microcapsules preparation was investigated with sodium alginate as wall material, CaCl₂ and chitosan as curing agents. The results showed that the critical conditions for the stability reduction（limit if anthocyanins mass fraction was less than 30%） of anthocyanins were 40 ℃, indoor light, pH value of 3.0, sucrose concentration of 100 mg/mL, and temperatures had the greatest effects on the stability. The best preparation technology of anthocyanin microcapsules was determined as follows: syringe needle aperture of 0.70 mm, core to wall ratio of 1∶4（V/V）, sodium alginate mass concentration of 30 mg/mL, CaCl₂ mass concentration of 20 mg/mL, chitosan mass concentration of 15 mg/mL. Under these conditions, the prepared anthocyanin microcapsules were spherical and smooth with embedding rate of 91.54%.