For a 3*3 cm ascending colon mass, right hemicolectomy is mainly used in clinical practice. For 3*3 cm diameter ascending colon mass, consider the possibility of colon cancer, which is a common malignant tumor of the gastrointestinal tract, the need for surgical resection of the local intestinal tract, including the mass, and according to the situation, expand the scope of the operation, if necessary, but also need to be carried out in the area of lymph node dissection. The main surgical procedure for ascending colon mass is right hemicolectomy, which is performed under general anesthesia, including the right half of the transverse colon, the end of the ileum and the corresponding mesentery, and the gastric group 6 lymph nodes are resected, and after the resection, the ileum and the transverse colon are anastomosed either end-to-end or end-to-side. Regional lymph node dissection is also required if necessary. The discovery of colonic mass, it is recommended to seek medical treatment as soon as possible, clear diagnosis, standardized treatment, and follow the doctor’s instructions, so as not to delay the condition.