The invention belongs to the technical field of cooking films, and relates to a toughened cooking film, which is formed by carrying out sequential lamination arrangement casting co-extrusion on a heatsealing layer, a core layer, a toughening layer and a corona layer, wherein the raw materials of the heat sealing layer comprise, by mass, 40-50% of a ternary random copolymerized polypropylene resin, 40-50% of an ethylene-vinyl acetate copolymer, and 10-20% of a modified master batch, the raw materials of the core layer comprise, by mass, 30-50% of a drawing-grade polypropylene resin, 25-35% ofan ethylene-propylene elastomer, and 25-35% of metallocene polyethylene, and the raw materials of the toughening layer comprise, by mass, 65-75% of a polypropylene resin, 5-10% of an ethylene-propylene elastomer, 15-25% of high density polyethylene, 5-10% of a polyamide resin, and 0.01-0.2% of maleic anhydride. The toughened cooking film of the present invention has advantages of excellent puncture resistance, good barrier property and high-temperature resistance.