According to the optimal critical point, the sensitivity was 91.3%, 82.6%, 89.1%, 89.1% and 63.0%, and the specificity was 47.1%, 93.3%, 100.0%, 84.6% and 85.6% when the value of TM, TG, D-D, Fb and CRP was higher than 9.505 IU/ml, 1.935 mmol/L, 0.595 mg/L, 3.365 g/L and 22.120 mg/L respectively in diagnosing DVT, with statistically significant difference (p<0.05). Here, CRP is linked to deep vein thrombosis.