The invention relates to a method for improving the content of kok-saghyz anthocyanin. The method is characterized in that a gene cloning method is adopted to obtain an arabidopsis anthocyanin compounding regulatory factor 1 full-length gene; a recombinant expression vector is constructed by the arabidopsis anthocyanin compounding regulatory factor 1 gene and a plant expression vector; leading positive plasmid of the recombinant expression vector to agrobacterium tumefaciens; agrobacterium tumefaciens-mediated is adopted to convert the kok-saghyz, so as to obtain transgenosis 5 kok-saghyz with high anthocyanin; measuring anthocyanin content and gel content to transgenosis kok-saghyz. The transgenosis kok-saghyz has the advantages that anthocyanin content is high, and the method for improving kok-saghyz anthocyanin content is in favor of large-scale development and utilization and industrialization development of kok-saghyz.