The invention discloses an edible fruit and vegetable enzyme prepared from the following raw materials by the mass percentage: 45-80% of fruits and vegetables, 1-10% of an enzyme live keeping agent, and 15-50% of a bacterial liquid. The invention provides the edible fruit and vegetable enzyme and a preparation method thereof; preparation conditions simulate natural generation conditions of the enzyme, a principle is scientific, devices are simple, and the method is suitable for mass production; besides comprising various edible enzymes, main components of the enzyme comprise trace elements, minerals, vitamins, amino acids, proteins, carbohydrates and the like; especially, after the enzyme live keeping agent is used, the activity of the enzyme is protected, various extracellular enzymes are completive, the vitality is strong, moreover, most of beneficial living bacteria can smoothly pass through a stomach, are set in intestinal tracts and perform mass propagation, various enzymes are produced, food in the intestinal tracts are effectively decomposed, junk of the intestinal tracts is cleaned up, beneficial microbial flora of the intestinal tracts are maintained, and the intestinal tracts are facilitated to absorb various nutrients.