Mucinous adenocarcinoma is a kind of malignant tumor of epithelial origin, and its development is caused by a variety of factors, which are analyzed as follows: First, dietary factors, including patients often eat spicy, greasy and irritating foods, as well as smoked and rough foods, can cause the occurrence of cancer. Secondly, geographical and environmental conditions, racial factors and blood type are also related to the occurrence of mucinous adenocarcinoma. Thirdly, genetic factors and genetic mutations are one of the main reasons for the occurrence of malignant tumors such as mucinous carcinoma. Fourthly, some undesirable stimulating factors, such as ionizing radiation, excessive mental stress and X-ray irradiation, can also induce the occurrence of cancerous changes. Therefore, it is recommended that patients must have regular health checkups and develop good eating and living habits to prevent the occurrence of malignant tumors.