This work is a modular fast food box built to meet the actual needs of modernization. Its biggest feature is that it is made of fully degradable materials such as PLA, PBAT, PBS and corn starch. It can be completely degraded into carbon dioxide and water in a natural composting environment. At the same time, it can achieve high temperature resistance of 120 °, low temperature of -20 °, microwave freezing, and a brand-new heavy functional design. This fast food box is divided into three modules from the outside to the inside. The box cover design on the top layer combines the integrated storage and groove design. The inner side can accommodate tableware, and the outer side can be used as a mobile phone holder. It is convenient for users to watch plays while enjoying delicious food. It has excellent practicability. The independent thermos bowl in the inner layer of the middle can not only prevent the soup from splashing and mutual flavor, but also facilitate the exchange of dishes with colleagues and friends, thus improving interactivity. The inner tray part also plays a role in fixing the heat preservation bowl outside separating the upper and lower layers. Its unique "0 redundancy" structure design makes each line texture design in this work have its functional significance, helping the dishes to keep warm.