Rectal adenocarcinoma T4bN2M0 is one of the types of staging based on the depth of pathological tumor infiltration (T), lymph node metastasis (N), and the presence of distant metastasis (M). In rectal adenocarcinoma T4bN2M0, T4b stands for direct tumor invasion or adhesion to other organs or structures, N2 stands for four or more lymph node metastases in the region, and M0 stands for the absence of distant metastases. Rectal adenocarcinoma T4bN2M0 belongs to stage IIIC, and its staging can be used to guide clinical treatment options. When the existence of intestinal tumor is suspected, one should go to regular hospitals and under the guidance of professional doctors for examination and treatment. Besides, one should pay attention to maintaining good living and dietary habits, avoiding spicy and stimulating foods, exercising properly and maintaining an optimistic and positive mindset.