Objective To explore preventive effect of evidence-based nursing intervention program in patients at high risk of pressure ulcer in intensive care unit.Methods A total of 227 patients with risk evaluation score of Braden leas than 12 were randomly divided into the observation group (125 cases) and the control group (102 cases).The control group was only given regular nursing interventions.Patients in the observation group received evidence-based nursing interventions : including turning over per 2 hours, turning prostration to 30 degree left to fight inclined position, raising patient's head lower than 30 degree and putting a soft pillow under his/her heels; the patients whose risk evaluation score of Braden was less than 7, with cervical fracture or turning ever was limited by her/his situation needed to use air bed; comfeel transparent paste was used on the surface probably suffered from skin ulcer;, giving PN or EN according to patients' nutritional condition; keepping the skin around anus dryness.The incidence of pressure ulcer be-tween the two groups was compared.Results The incidence rate of pressure ulcer was siguificantly lower in the observation group than that in the control group.The occurring time significantly delayed and the sit-uation significantly better.Conclusions The evidence- based nursing inventions can lower the incidence rate of unavoidable pressure ulcer,reflect the scientific and artistic characteristics of nursing care, also effi-cient allocate limited nursing resources and reduce the incidence of pressure ulcer.