The survival period of rectal cancer metastasis to bone is about 0.5-1 year. Because metastasis of rectal cancer to bone is a case of advanced rectal cancer, once bone metastasis occurs, it will manifest as obvious pain, which will lead to paraplegia and urinary and fecal incontinence in serious cases. If paraplegia and incontinence occur, it will seriously affect the patient’s quality of life, thus affecting the patient’s life expectancy. For this kind of rectal cancer metastasis to bone, 2 kinds of treatments can be used: 1) local radiotherapy or particle implantation for bone metastasis; 2) systemic treatment for rectal cancer, such as chemotherapy, together with targeted therapy and other treatments. These treatments can prolong patients’ progression-free survival time, reduce patients’ pain and prolong their life expectancy.