Intestinal radiculopathy presents with small bowel crisis in about 1 week. Acute radiation sickness (acuteradiationdisease) is a systemic disease caused by exposure of the body to a large dose (1Gy) of ionizing radiation in a short period of time. Acute radiation sickness can occur with both external and internal exposure, but external exposure is the main cause. The rays that cause acute radiation sickness from external exposure include gamma;rays, neutrons, and X-rays. Lymphocyte (mainly spleen and lymph nodes) change rule is similar to the bone marrow, also to cell division inhibition, cell necrosis, reduction and hemorrhage, its development is faster than the bone marrow, the recovery is also earlier than the bone marrow, but the complete recovery needs a longer time. With the development of hematopoietic organ lesions, the clinical process of myeloid radiculopathy has obvious stages, which can be divided into the initial stage, false healing stage, extreme stage and recovery stage. Particularly pronounced are the moderate and severe stages. Preventive methods for small bowel crisis Radiation workers should strictly follow operating procedures and protection regulations to minimize unnecessary exposure. Shielding should be placed between the radiation source and the worker according to the nature of the rays; the operation should be skillful and the time of exposure to the source should be shortened; and efforts should be made to increase the distance between the source and the radiation source to reduce the exposure dose. Strict pre-employment medical examinations should be conducted. Active tuberculosis, diabetes mellitus, glomerulonephritis, endocrine and hematologic diseases are contraindications to exposure to radiation. Regular physical examination and establishment of personal health and dose profile information. Visible signs should be set up when using radioactive sources to prevent accidents.