Objective: To evaluate the effect of Osteoking (恒古骨伤愈合剂) in preventing postoperational deep venous thrombosis (DVT) in patients with intertrochanteric fracture (ITF). Methods: With prospective and randomized controlled clinical design adopted, 62 patients with ITF after operation were assigned into 2 groups, the tested group and the control group, Osteoking (25 ml every other day) and SanchiDifference of round length of thighs and shanks between two sides were measured on the 10th day and Doppler ultrasonic examination on the fractured leg was carried out. Results: The occurrence rate of DVT in the tested goup was 9.4%, which was lower than that in the control group (30.0%, P＜0.05). All the difference of round lengths, either that of the thigh or the shank, was less in the tested group than that in the control group, showing statistical significance ( P＜0.05 ). Conclusion: Osteoking has a satisfactory effect in preventing postoperational DVT in patients with ITF.