Abstract:Objective?To explore the risk factors, prevention and treatment of venous thromboembolism in patients who underwent radical resection of colorectal cancer.?Methods?A total of 86 patients with colorectal cancer in Gansu Provincial People’s Hospital who suffered from venous thromboembolism (VTE) after operation during May 2012 to December 2018 were retrospectively selected as the case group, and 84 cases without VTE after surgery in the same period were selected as the control group by systematic sampling. The risk factors of VTE after surgery were investigated, and the diagnosis and treatment methods were further elaborated by combining clinical manifestations, auxiliary examinations and current treatments.?Results?The clinical characteristics of the patients in gender, moderate obesity, diabetes, high blood pressure, neoadjuvant chemotherapy, surgical method, surgery procedures, the use of hemostatic drugs, blood transfusion, and infection were significantly different between the case group and control group (P < 0.05). Besides, there were statistically significant differences in age, platelet (PLT) count and D-dimer levels between the case group and the control group (P < 0.05). Logistic regression analysis showed that age > 53.5 years old [OlR?=?2.258, (95% CI: 1.019, 5.044)], diabetes mellitus [OlR?=?2.688, (95% CI: 1.237, 5.842)], neoadjuvant chemotherapy [OlR?=?2.424, (95% CI: 1.147, 5.123)], blood transfusion [OlR?=?2.559, (95% CI: 1.073, 6.103)], surgical method [OlR?=?2.044, (95% CI: 1.044, 4.002)], PLT count [OlR?=?7.800, (95% CI: 2.689, 22.625)], and D-dimer level [OlR?=?25.416, (95% CI: 8.726, 74.013)] were risk factors for the development of VTE after colorectal cancer surgery.?Conclusions?The nursing and early ambulation after surgery should be emphasized, and the pressure therapy should be given to promote the venous return in the lower limbs. The low-molecular-weight heparin calcium can be administered to prevent the occurrence of VTE when necessary. If the patients suffered from VTE, the treatment regimens should be formulated based on the bleeding risk and specific conditions of VTE.