30例病例中穿孔前有提示大肠恶性肿瘤症状者21例．以急性腹膜炎为首发表现者9例。X线气腹阳性率为63％。穿孔的主要原因为肠梗阻、近端肠管缺血、坏死，穿孔的好发部位为乙状结肠。术后并发症发生率为40％，手术死亡率为27％。中毒性休克是凶险预兆，死亡与腹腔污染、感染程度有关。远期效果不良，1、3、和5年生存率分别为5O％、32％和8％。 Twenty-one patients with colorectal malignancy symptoms before perforation in 30 cases. Nine patients with acute peritonitis were the first performers. X-ray pneumoperitosis positive rate was 63%. The main causes of perforation were intestinal obstruction, proximal bowel ischemia, and necrosis. The perforation site was predominantly sigmoid. The postoperative complication rate was 40%, and the operative mortality rate was 27%. Toxic shock is a sign of danger. Death is related to the degree of contamination and infection in the abdominal cavity. The long-term effects were poor, with 1-, 3-, and 5-year survival rates of 50%, 32%, and 8%, respectively.