Objective:To study the surgical treatment principles of obstructive colorectal cancer. Methods: The clinical data of 108 cases of obstructive colorectal cancer treated in our hospital in recent 10 years were retrospectively analysed. Of 30 cases of right hemicolon cancer ,28 cases received primary hemicolectomy and anastomosis,1 underwere conversative operation,and 1 received non-operative treatment.In 78 patients with left hemicolon or rectal cancer,56 underwent primary resection ( primary and secondary anastomosis were performed on 32 and 24 cases, respectively), and 11 received two-stage resection;nonresectable cancer underwent by-pass procedures in 6 cases,and non-operative treatment in 5. Results:Most obstructive colorectal cancer were moderate or poor differentiated adenocarcinoma (65 cases) and in Dukes C or D stages(59 cases) .Postoperative complications rate was 27.3%(26 cases,46 times),most were infective complications(35/46) including 4 cases of anastomotic leakage. Eight cases died during perioperative period. The 5-year survavil rate in operative and nonoperative cases was 28.4% and 0% respectively(P<0.01) ;and in cases underwent primary or secondary tumor resection was 33.3% and 9.0% respectively（P<0.05）. The 5-year survival rate in cases underwent primary tumor resection. with one- or two-stage anastomosis was no significant difference(P>0.05). Conclusions:The surgical treatment principles for patients with obstructive colorectal cancer is to remove the tumor and relief the obstruction by one-stage operation individually if possible.But one-or two-stage anastomosis after tumor resection seems to be no influence on the patients prognosis.