The application of plant dyed yarn in infant clothing, the infant clothing includes infant finished clothing, accessories and derivative products, it is characterized in that the infant finished clothing, accessories include male and female infants and young children's bottoming shirts, Underpants, skirts, T-shirt suspenders for outer wear, underwear, pajamas, home clothes, thermal clothing, and knitted sweaters; the derivative products include bibs, socks, hats, scarves, and gloves for boys, girls, and boys. The invention also provides an application method. The invention combines the natural fiber and plant dyeing technology and applies it to infant clothing and apparel products.