The invention discloses a treatment method of an ultraviolet-resistant aromatic high-performance fiber. The method comprises the steps that an ultraviolet-resistant treating agent is prepared into a treating solution with the bath ratio of 15-50 to 1 according to the fiber weight of 1.5-5%, even stirring is performed, the pH of the ultraviolet-resistant treating agent is regulated to be 5-7, then the aromatic high-performance fiber is put in the ultraviolet-resistant treating agent, and treatment is performed according to the steps and conditions of a conventional high temperature and high pressure dyeing process (shown in the description). By the adoption of the treatment method, the aromatic high-performance fiber can play a lasting ultraviolet-resistant function, can also synchronously achieve corresponding fiber dyeing, the strength retention rate of the fiber subjected to ultraviolet irradiation is effectively improved, an operation process is simple, and the conditions are easy to control. The method is suitable for industrialized production.