The invention relates to an enteral nutrition emulsion used for tumor patients, which is characterized in that the emulsion of every 1000mL contains 30g to 50g of holothurian amylase, abalone amylase, oyster amylase or meretrix amylase, 50g to 70g of pearl oyster meat powder, soybean protein powder or fish protein powder, 15g to 25g of spirulina powder, 6ml to 8 ml of olive oil, 3g to 8g of an emulsifier and water of rest amount. The enteral nutrition emulsion can improve the activity of free radical scavenger enzymes of the organism, enhance the oxidation resistance of tissues and adjust the immune function so as to ensure the increasing trends of the weight, the upper-arm circumference and the skin fold thickness of the brachial triceps muscle of a sufferer, and gradually normalize various blood biochemical indicators, thereby reducing damages caused by operation or radiotherapy and chemotherapy to the immune system, being capable of providing nutritional supports for the tumor patients of head and neck cancer, esophageal cancer, pancreatic cancer, liver cancer, and the like as well as the tumor patients who accept radiotherapy and chemotherapy, and promoting the recovery of the patients.