The invention discloses a fall resistant and antibacterial PP plastic meal box and a preparation method thereof. The meal box comprises the following raw materials, by weight: 100 parts of PP resin, 50-100 parts of bagasse, 5-10 parts of chitosan, 5-15 parts of shell powder, 10-20 parts of nanometer calcium carbonate, 3-6 parts of a sepiolite fiber, 1-2 parts of phytic acid, 1-3 parts of a modifier, 0.5-2 parts of a coupling agent, 1-2 parts of a plasticizer, 0.5-1.5 parts of an antioxidant, 0.5-2 parts of a composite antibacterial agent, 1-3 parts of cocoamidopropyl betaine, and 3-5 parts ofcarboxymethyl cellulose. The modifier consists of octa(aminophenyl)silsesquioxane and polyethylene glycol stearate in a ratio of 1:1-3. The preparation method adopts the unique raw material formula and coordination effect of the components, the compatibility is good, and the prepared PP plastic meal box has the advantages of high strength, strong impact resistance, fall resistance, wear resistance, weather resistance, high temperature resistance, aging resistance, deformation resistance, good stability, good antibacterial effect and the like, is good in processing performance, simple in process and low in cost, and has good market prospects.