Objective: To eplore the effective measure to prevent postopelative deep vein thrombosis (DVT).Methods:510 cases of hospitalzed surgical patients from January 2005 to December 2007 were divied into observation group(without any preventive measure) and control group(including physiotheragy group,elastic socks with gradient pressure group and intermittent pressure device group).To observe the patients changes in 10 days after operation.Results:There were 6 cases of DVT in 125 cases of observation group(with the occurrence rate of 4.8%).In control group,there was I case of DVT in 125 cases of physiotherapy group(with the occurrence rate of 0.8%) and no cases of DVT in the other two observation groups.Conclusion:The elastic soks with gradient pressure and the intermittent pressure device can effectively prevent the occurrence of postoperative DVT.