The invention belongs to the technical field of foods, in particular to a paste food for recuperating and treating chromic gastrosis and a preparation method thereof. Solid matters of the paste food comprise the following raw materials in part by weight: 2 to 15 parts of codonopsis pilosula, 1 to 15 parts of rhodiola rosea, 1 to 15 parts of coix seeds, 0.5 to 10 parts of semen hoveniae, 0.5 to 10 parts of seville sour orange, 0.5 to 10 parts of bulb of fritillary, 0.5 to 10 parts of asiatic pennywort herb, 0.5 to 10 parts of dandelion, 1 to 30 parts of cactus, 0.2 to 10 parts of seabuckthorn oil, 2 to 30 parts of whey protein powder, 2 to 40 parts of isomalto oligosaccharide, 2 to 40 parts of xylooligosaccharide, 5 to 60 parts of inulin, 1 to 20 parts of viburnum fruit juice and 2 to 30 parts of rice starch. The paste food meets the requirements of gastrosis patients on having more meals a day but less food at each, can prevent and treat gastralgia, gastrectasia and gastric acid, can relieve economic burden of the gastrosis patients, has rational formula combination, is not cold or dry, has mild medicinal property and the effects of nourishing and circulating and recuperating to treat the diseases, does not have a side effect and conforms to health-care culture of medicament and food homology of traditional Chinese medical science.