There is no way to determine the speed of peritoneal metastasis of gastric cancer, which needs to be determined by the stage and pathological type. Peritoneal metastasis of gastric cancer means that the tumor starts to invade the plasma membrane layer, which mostly occurs in the middle and late stages. There is no way to determine the specific metastatic speed of gastric cancer, and it needs to be determined by the comprehensive degree of differentiation and pathological type. For patients with low differentiation type of gastric cancer, because of the fast reproduction and growth of cancer cells, their metastasis and spreading speed are relatively fast, and they may metastasize to the peritoneum at an early stage; In case of highly differentiated gastric cancer patients, the growth rate of cancer cells is slower, and the metastasis will be slower, and the peritoneal metastasis may occur in the middle or late stage. It is suggested that patients should actively cooperate with doctors to delay the progress of the disease.