The invention relates to a use of a banana flower extract for manufacturing compositions for anti-oxidation and inhibition of tyrosinase activity by applying an effective does of the banana flower extract to skin. The banana flower extract can be used to slow down skin cell DNA damage caused by UV, scavenge free radicals, chelate ferrous ions and inhibit tyrosinase activity. Accordingly, the banana flower extract can be further utilized in manufacturing cosmetic compositions, food additives or pharmaceutical compositionsfor anti-oxidation or whitening, so as to achieve the efficacy of slowing down skin cell damage, whitening and anti-oxidation.本發明係有關於一種香蕉花萃取物用於製備抗氧化及抑制酪胺酸酶活性之組成物的應用,施予香蕉花萃取物一有效劑量於皮膚,可用以減緩皮膚細胞DNA受紫外線傷害、清除自由基、螯合亞鐵離子以及抑制酪胺酸酶活性;藉此,香蕉花萃取物用於製備抗氧化或美白淡斑之化妝材料組成物、食品添加物或醫藥組成物,可達到減緩皮膚細胞受損、美白與抗氧化之功效。