Peritoneal metastasis of stomach cancer generally means advanced stage of stomach cancer. If peritoneal metastasis occurs in stomach cancer patients, it means that they have reached the advanced stage of stomach cancer. If they are not treated in time, the survival period will be shortened sharply, and there may be only a few months of survival. Even if the conventional anti-tumor treatment plan is taken, the efficacy will not be ideal and the prognosis is often poor. After peritoneal metastasis of gastric cancer, one should actively cooperate with doctors to carry out chemotherapy to avoid further deterioration and prolong the survival period. Once peritoneal metastasis of gastric cancer occurs, the condition becomes more serious and the patient loses the best time for surgical resection and treatment, it is recommended to cooperate with professional oncologists to carry out intravenous chemotherapy as soon as possible, or adopt abdominal heat infusion chemotherapy to kill the metastasized cancer foci, to control and slow down the continued development of the condition, to prolong the patient’s life cycle as much as possible and to improve the quality of survival.