Abstract: ［Abstract］ Objective〖HTSS〗〓To investigate acute gastrointestinal injury(AGI) in critically ill patients in Hebei, to find out the differences between practice and guideline，to formulate the effective protocol and improvement measures.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓Threehundred and twenty critically ill patients were included in 25 intensive care units of tertiary hospital of Hebei province. A database of information was built from questionnaires, which included characteristics of patients, types of diseases, Acute Physiology and Chronic Health Evaluation Ⅱ score，Sequential Organ Failure Assessment score, length of stay, length of ICU stay, mortality in ICU and at 28 days, the severity of AGI and so on.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓A total of 207 critically ill patients who were received enteral nutrition was enrolled in the survey to assess the severity of AGI. It is found that AGI grade Ⅰ accounted for 60.4%. AGI grade Ⅱ accounted for 26.6%. AGI gradeⅢaccounted for 10.6%. AGI gradeⅣaccounted for 2.4%. There was a great distance between clinical nutritional practice and guideline recommendation.
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓Physician should improve the degree of recognition for acute gastrointestinal injury and enhance study and training for the guideline of acute gastrointestinal injury, combine the guideline with individualized treatment.

Key words: critical illness, acute gastrointestinal injury, nutritional support