Objective:To investigate the effect of early enteral nutrition(EEN) on nutritional state and metabolism in the critically ill patients.Methods:65 patients who had been in intensive care unit(ICU) were randomly divided into 2 groups:one group(n=35) as EEN group,another group(n=30) as parenteral nutrition(PN) group.The results of nutrition support were analysed.Results: It was found that serum albumin and hemoglobin were elevated(P0.05).Conclusion: Early enteral nutrition support has better nutritional effect in critically ill patients.