Because pediatric has its own peculiarities in anatomy and physiology, the response to stimuli such as trauma, shock and sepsis is different from that of adults, and the resistance also has a large difference. For the same area of deep burns, the incidence of shock, sepsis and death is higher in pediatric than in adult, so the classification of pediatric severity is different from that of adult. 1, mild burns: total area of 5% or less of the second degree burns; 2, moderate burns: total area of 5% to 15% of the second degree burns or Ⅲ degree burns area of 5% or less of the burns; 3, severe burns: total area of 15% to 25% or Ⅲ degree burns area of 5% to 10% between the burns; 4, extra-severe burns: total area of 25% or more or Ⅲ degree burns area of 10% or more of the burns. Because the above classification standards can not reflect the level of treatment of large burns in China, but also can not reflect the true severity of burns, so the current clinical use of “small area”, “medium area”, “large area ” and “very large area” to indicate the severity of burns. 1.Small area burns: Ⅱ degree burns within 10% or Ⅲ degree burns within 1%, equivalent to light burns; 2.Medium area burns: Ⅱ degree burns with a total area of 11% to 30% or Ⅲ degree burns with an area of 10% to 20%, equivalent to moderate or severe burns; 3.Large area burns: total area of 31% to 79% or Ⅲ degree burns with an area of 21% to 49%; 4.Extra large area burns: total area of 31% to 79% or Ⅲ degree burns with an area of 21% to 49% 4.Extra large area burns: total area of more than 10% or Ⅲ degree burns area of more than 50%.