4-4.0×104 units added into normal saline 100 mL, 50 mL/h, twice daily. Patients in the control group were subcutaneous injection administered with Low-molecular-weight Heparin Calcium Injection on the basis of basic thrombolysis, 4 100 AXaIU/time, twice daily. Patients in the treatment group were pumped with Argatroban Injection on the basis of basic thrombolysis, 40 mg added into normal saline 320 mL, 20 mL/h, once daily. Patients in two groups were treated for 7 d. After treatment, the clinical efficacy was evaluated, and the ABI, limping distance, D-dimer level, complication, and adverse reactions in two groups before and after treatment were compared. Results After treatment, the clinical efficacies in the control and treatment groups were 73.33% and 93.33%, respectively, and there was difference between two groups (P<0.05). ABI and limping distance in two groups were significantly increased, and the difference was statistically significant in the same group (P<0.05). And limping distance in the treatment group was higher than that in the control group, with significant difference between two groups (P<0.05). On the treatment for 7 d, D-dimer level in two groups was significantly increased, and the difference was statistically significant in the same group (P<0.05). On the treatment for 3 d, D-dimer level in the treatment group was significantly decreased, and was lower than that in the control group, with significant difference between two groups (P<0.05). The rate of adverse reactions in the control and treatment groups were 13.33% and 0, respectively, and there was significant differencebetween two groups (P<0.05). Conclusion Argatroban combined with urokinase by infusion catheter thrombolysis has good effect in treatment of lower extremity atherosclerotic occlusive disease with thrombus, and can improve corresponding symptoms with good safety."/>