Benign rectal mesenchymal tumors may present with constipation, abdominal mass and other clinical manifestations, and can be diagnosed in the hospital under the guidance of a doctor by combining clinical manifestations and endoscopy. Benign rectal mesenchymal tumors may have no clinical manifestations if the mass is not large, if the mass increases, there will be changes in bowel habit, such as constipation, and if the mass increases further, there may be abdominal mass or some symptoms of compression by the mass, which may lead to malignant changes. The gold standard for diagnosing benign rectal mesenchymal tumors is endoscopy, through which the size, location and shape of the lesion can be observed, and biopsy can be obtained under direct vision for pathological examination, which is the most reliable and effective method for diagnosing benign rectal mesenchymal tumors. If diagnosed with benign rectal mesenchymal tumors, patients need to follow up regularly under the guidance of doctors to prevent malignant tumors. Meanwhile, patients should pay attention to their diet, reduce high-fat, salted and fried foods, and eat more fresh vegetables and fruits.