Surgery can be considered for colorectal cancer metastasis to the abdominal cavity. If the metastasis is simultaneous metastasis (clinically, the metastasis occurring at the time of the first diagnosis or within three months after the operation is called simultaneous metastasis), then assess whether the lesion can be resected by standardized surgery, and then consider surgical resection if there is a chance of surgical resection. If surgical resection is difficult through the assessment, arterial perfusion therapy can be taken, combined with molecular targeted drug therapy, etc. If the lesion shows obvious shrinkage, downstaging, and reaches the surgical requirements, then surgical resection can also be considered. If the patient’s lesion never reaches the surgical requirements, then we need to do systemic systemic treatment according to the patient’s own state, the main means or systemic chemotherapy, in the case of the physical condition can be tolerated, to alleviate the patient’s symptoms and improve the quality of life.