The invention discloses a detergent for food cleaning. The detergent is prepared from main components in parts by mass as follows: 8-10 parts of lemon peel juice, 2-4 parts of ginger juice, 5-7 partsof propylene glycol, 2-4 parts of sodium citrate, 6-8 parts of sodium carbonate, 1.3-1.5 parts of gleditsia sinensis powder, 5-9 parts of starch, 2-4 parts of baking soda, 2-4 parts of edible salt, 10-13 parts of a fruit peel mixed solution and 130 parts of purified water. The detergent contains no harmful substances, is prepared from fruit juice, has higher food safety as compared with the priorart, is suitable for cleaning food and is high in cleaning degree.