The design concept of 8-cavity disposable plastic baking packaging box is to solve the inconveniences of traditional baking packaging boxes during use, such as difficult to clean, wasted space, poor preservation and other problems. Each box of this packaging box can be divided into 8 small chambers, each of which is of moderate size and suitable for packaging cakes, macarons, cupcakes, small cookies and other baked goods. The 8-cavity design allows each food to be stored independently to avoid squeezing or contamination of each other, and to maintain the appearance and taste of the food to the greatest extent. The depth and diameter of each chamber are reasonably designed to accommodate most common sizes of baked goods. The edge of the packaging box adopts a closed design, which can effectively prevent the entry of air, dust and moisture, thereby extending the freshness and shelf life of the food. The sealed design can also prevent cross-contamination of odors and ensure that the flavors of different foods are preserved independently.