Being a professional hospitals for burns of the country, the ratio of patients with severe burns, severe burns treated at the National Institute of Burns occupies a fairly high rate. Research the related pathological characteristics as well as common complications in these patients will provide us with the basis of prognosis and provide better treatrnent strategies. Retrospective study on 746 patients with severe and very severe burns resqscitation in ICU, National Institute of Burns from January 2011 to December 2012 show the pathological characteristics in patients with severe burns, very severe burns, and also shows us what kind of complications can occur in patients with severe burns, severe as well as the rate of such complications.