The invention discloses digestive lactic acid bacteria composite powder which is prepared from raw materials including, by weight, 20-35 parts of inulin, 15-20 parts of sorbitol, 15-20 parts of integrated fruit and vegetable powder, 5-15 parts of maltodextrin, 5-15 parts of compound probiotics powder, 5-15 parts of West-Indian cherry fruit powder, 5-15 parts of composite-enzyme tri-beneficial bacteria, 3-10 parts of fructo-oligose and 3-10 parts of vitamin C. The invention further discloses a preparation technology of the product. The synergic effect of the components in the composite powder is achieved, a biological barrier is formed, invasion and infection of harmful bacteria is resisted, immunity is enhanced, detoxifying is promoted, digestion, absorption and metabolism of the intestinal tract is facilitated, nutrients and cholesterol are helpfully synthesized, and metabolism of fat, protein and saccharides is promoted; by the use of the product, gastrointestinal environment can be purified, internal organs can be protected, acidic condition of the human body can be adjusted into healthy alkaline condition, blood vessels can be purified, and triglyceride can be reduced; the product is suitable for most of the crowd like pregnant women and children, wide in application of the crowd and good in use effect.