How long can one live after surgery for sigmoid colon cancer is mainly related to the severity of the disease, if the surgery is performed in the early stage of the disease, the survival rate is higher, if it reaches the advanced stage, the survival rate is lower. At present, sigmoid colon cancer is divided into 4 stages clinically. In the early stage of the disease, when the tumor only invades into the mucous membrane layer and intrinsic muscle layer, and there is no distant metastasis, the prognosis is better, and the hope of cure is also greater, and the survival rate of 3 to 5 years is still relatively high. If the stage of sigmoid colon cancer comes to III or IV, at this time, the tumor has invaded the surrounding tissues and organs, and distant metastasis occurs, the cure rate is lower, and the survival rate of 5 years is only less than 20%. After the surgery, you should try to consume less smoked and pickled food, and it is better not to drink alcohol, but also pay attention to the intake of dietary fiber, and exercise your ability to defecate by lifting the anus.