Gastrointestinal mesenchymal tumors grow mainly by localized expansive growth. Gastrointestinal mesenchymal tumors are tumors that originate in the mesenchymal tissue of the gastrointestinal tract and range in diameter from 1-2 cm to more than 20 cm. Gastrointestinal mesenchymal tumors grow in a restricted fashion, most of them have an encapsulated membrane and their boundaries are well defined. Gastrointestinal mesenchymal tumors with intraluminal growth appear as polypoid masses and are often accompanied by ulcerations, while those with extraplasma growth form subplasma masses. Gastrointestinal mesenchymal tumors rarely show lymphatic metastasis and invasion of surrounding organs, but distal metastasis may occur. Due to the limited growth characteristics of gastrointestinal mesenchymal tumors, their treatment is mainly surgical, which allows complete resection of the tumor site, thus preserving organ function to the greatest extent possible. Patients with gastrointestinal mesenchymal tumors should go to regular hospitals for timely evaluation and actively cooperate with doctors to give treatment.