The invention relates to a high-content polylactic acid bottle and belongs to the field of high-molecular materials. The polylactic acid bottle is prepared from, by weight, 90-98 parts of polylactic acid, 1-10 parts of an antioxidant, and 1-5 parts of a chain extender. The materials are subjected to granulation through a twin-screw extruder, and then the granules are dried and are subjected to injection molding through an injection molding machine; finally blow molding is carried out through a blow molding machine to prepare the polylactic acid bottle. Through blend modification of polylacticacid, a problem of poor insulation property of the polylactic acid is solved, and oxygen resistance of the polylactic acid bottle can be equivalent with that of PET. The polylactic acid bottle is suitable for containing edible oil and guarantees food safety.