Deep vein thrombosis occurs frequently as a postoperative complication, particularly after orthopedic surgery and increasing number of patients were referred to the outpatient clinic of vascular surgery. The aim of study was to identify the incidence of deep vein thrombosis among post operative major orthopedic surgical patients and to find out the association between the incidence of deep vein thrombosis with the selected background variables. The result revealed that Out of thirty subjects 20% subjects belongs to 10-30 years, 16.7% belongs to 31-40 years, 20% belongs to 41-50 years, 30% belongs to 51-60 years and 13.3% belongs to 60-100 years. With regard to sex 50% were males and 50% were females. As per the number of post operative day 6.7% subjects belong to first postoperative day and 13.3% belongs second POD, 23.3% belong third POD and 26.7% belong fourth POD and 30% belong fifth POD. According to duration of hospital 6.7% belong to 0-7 days, 43.3% belongs to one week to two weeks, 40% belongs to three to four weeks and 10% belongs above a month. The incidence of DVT by using Autar scale among post operative orthopedic surgical patients shows that 3.3% people have the low risk, 46.7% have moderate risk, 50% people have high risk of deep vein thrombosis. The mean and standard deviation of assessing the risk of deep vein thrombosis among post operative orthopedic surgical patients where the mean value was 17.36 and standard deviation was 2.17. there is asignificant association between body mass index and the risk for deep vein thrombosis.