Taiwan Textile Research Institute has developed a high-fastness fluorescent dope dyed fiber with dyeing fastness of more than 4, which solves the problem of dyeing fastness of fluorescent colored yarn, and has passed the fluorescent color gamut tested by EN ISO 20471 international standard. In addition, the fiber has the function of shading and heat insulation, which improves the effect of isolating ultraviolet rays and infrared rays from textiles in sunlight. It can be applied to outdoor sports, leisure and warning clothing to enhance the added value of textiles, and its quality exceeds the industry standard, thus becoming an international benchmark.