The invention relates to the technical field of high polymer materials, in particular to a food-grade antibacterial antistatic PLA material and a preparation method. The PLA material comprises the following substances in parts by weight: 50-70 parts of PLA resin, 10-20 parts of PBAT, 5-20 parts of filling mineral powder, 0.5-3 parts of an antistatic agent, 6-20 parts of an antibacterial agent, 3-5parts of a coupling agent and 1-2 parts of a lubricant. Compared with the prior art, the PLA material has the following beneficial effects that the used antibacterial agent is an inorganic-organic compounded antibacterial agent, so that the broad spectrum of the antibacterial material is further improved, the antibacterial effect is better, the cost is reduced, and the PLA material conforms to FDA, ROHS and REACH certification and tests and can be used for food and medical products. The used antistatic agent is sulfonate prepared by a distillation method, has good compatibility and no precipitate, and also has an excellent antistatic and dust-removing performance in a low-humidity environment.