The organic trace elements commonly used in piglets are copper (Cu), iron (Fe), zinc (Zn), manganese (Mn), and selenium (Se), and their distribution in pigs is different. Although pigs require a small amount of them, their role is very important. They are involved in nutritional metabolism processes such as protein, amino acids, nucleic acids, carbohydrates and vitamins, and are also necessary for physiological functions such as reproduction, immunity, growth and development. The application of organic trace elements in piglet production is particularly effective.