Objective To observe the therapeutic effect and effects on coagulation indexes ofXuefu Zhuyu Capsules combined with chemotherapy in treating patients with mid-advanced small cell lung cancer (SCLC).Methods Totally 100 patients with mid-advanced SCLC were randomly divided into observation group and control group with 50 cases in each group. The observation group was given EP chemotherapy combined withXuefu Zhuyu Capsules, while the control group was given EP chemotherapy for 4 cycles. The coagulation indexes of two groups before and after treatment were observed, and the clinical efficacy and TCM syndrome efficacy were evaluated.Results After treatment, the tumor volume and TCM syndrome scores of two groups were lower than those before treatment (P<0.01), and the observation group was lower than the control group (P<0.01). The effective rate of the observation group was 100%, higher than 88% of the control group, the difference was statistically significant (P<0.05). The improvement rate of TCM syndrome score was 98% in the observation group, and was 84.0% in the control group. The observation group was superior to the control group (P<0.05). In observation group, D-dimer, platelet count and fibrinogen after treatment were lower than those before treatment (P<0.05,P<0.01), and were lower than those in control group (P<0.01). There was no significant difference of all kinds of adverse reactions between the two groups (P>0.05).Conclusion EP chemotherapy combined with Xuefu Zhuyu Capsules can improve hypercoagulable state in patients with SCLC, improve the effect of chemotherapy, and do not increase the adverse reactions.