Abstract:Glycemic index of critical patient will be shown significant increasement under the influence of various stress factors during the period of hospitalization. Stress hyperglycemia will cause irreparable harm to multiple organs of the body in the hospital, and bring more complications, higher mortality rate, longer length of staying and more costs. According to recent research at home and abroad, we conducted a comprehensive analysis about prognosis of critical patient with stress hyperglycemia in different periods. Besides, we reviewed the management in patients with stress hyperglycemia in different periods.