Abstract: Objective To investigate the coagulable states of patient s with lung cancer by thrombelastography (TEG) Methods TEG and coagu lation routine were measured in 30 patients with lung cancer and 100 normal cont rol.Comparisons were made between lung cancer and normal control Results WTBZ The hypercoagulable sign of the most lung cancer (29/30) were showed that γ value (4.44±1.80min)、K value (2.06±1.73min) are obvious short and Ma v alue (66.44±6.45min)、Mε value (209.19±66.07) are obvious wide,compared w ith normol control (P<0.01).The hypercoagulable states are more obvious alo ng with the disease progressing. Conclusion The coagulopathy of p atients can be diagnosed according to the changes of TEG.It can be used as refer eces in judging the condition of patients,to prognose and instract the treatment for patients with lung caucer.