To investigate the UV resistance of anthocyanins under different factors, we selected Dwarf Ixora ( Ixora williamsii ) as the research subject. We studied the UV resistance of anthocyanins in petals of dwarf Ixora under different concentrations and pH values, as well as the changes in the concentrations of superoxide dismutase (SOD) and peroxidase (POD) after UV exposure. Our study has shown that the anthocyanin content in the petal of red-flowered Dwarf Ixora was higher than pink-flowered one. After comparing the UV-Vis spectra of the red and pink flowers with same concentration of petal extract, it was found that the red flowers had higher absorbance, and both exhibited their maximum absorption peaks at around 510nm to 520nm, indicating a significant presence of anthocyanins in the petal of Dwarf Ixora. Furthermore, anthocyanins exhibit different colors under varying pH conditions due to structural changes. We tested whether anthocyanins in buffer solutions at different pH levels displayed varying UV resistance and found that they were more UV-resistant under alkaline conditions than under acidic conditions. Plants often produce toxic reactive oxygen species (ROS) during their metabolic processes. Since ROS can cause damage to cells, plants have evolved antioxidant enzymes, such as superoxide dismutase and peroxidase, to eliminate ROS and reduce damage to the plant cells.