The treatment strategy for bowel cancer depends on clinical staging, which is also known as imaging evaluation. The treatment strategies for different stages of rectal cancer are completely different. In this article, we will talk about how to treat rectal cancer with different stages in detail. In case of early stage rectal cancer, surgery is the main treatment. So what is considered early stage rectal cancer? Generally speaking, rectal cancer whose tumor invades the muscle layer of intestinal wall without lymph node metastasis and distant metastasis can be considered as early stage cancer. How to diagnose early stage cancer? The most effective way is transrectal endoluminal ultrasound or magnetic resonance imaging (MRI). If the tumor only invades the mucosal layer or submucosal layer, and there is no lymph node metastasis, the distance from the anus is less than 8cm, the differentiation is good, the invasion of the intestinal perimeter is less than 1/3, and the cutting edge is sufficient, transanal local excision can be chosen if the above conditions are met at the same time, and the recurrence rate after surgery is less than 8%; however, if the above conditions are not met, then only radical excision (major surgery) can be performed. At present, many patients blindly choose transanal local excision in order to preserve the anus, and many doctors blindly make local excision regardless of the indications in order to meet the needs of patients, which often results in tumor recurrence, and the patient is the one who suffers in the end. If the stage of tumor is locally progressive, that is, the depth of infiltration exceeds the intrinsic muscular layer, with or without lymph node metastasis, in this case, the best treatment mode is multidisciplinary comprehensive treatment, that is, radiotherapy first, then surgery. From the clinical point of view, the vast majority of rectal cancer patients are locally progressive rectal cancer. There are two benefits of radiotherapy first and then surgery: 1. It can significantly reduce the local recurrence rate. According to the experience of our hospital for more than ten years, the cure rate of locally progressive rectal cancer under multidisciplinary treatment mode can reach more than 70%, and the local recurrence rate is reduced by half compared with direct opening to. 2. Tumor shrinkage after radiotherapy has turned many patients from not being able to preserve anus to being able to preserve anus, and many patients with low rectal cancer have thus preserved their anus. Our treatment experience has been reported in international conferences and articles have been cited in many authoritative academic journals. Therefore, the multidisciplinary comprehensive treatment model is the standard treatment model for locally progressive rectal cancer. Finally, in the case of advanced rectal cancer, that is, rectal cancer with distant metastases, there is not no hope of cure. In the future articles, we will introduce the treatment of advanced rectal cancer, so stay tuned.