In detail, compared with the traditional diet, the light diet has three characteristics: firstly, the light diet is relatively simple and time-saving, unlike the traditional diet, which has a series of processes such as preparing ingredients and frying and cooking, it may take several hours to cook a meal, but it only takes ten minutes or even a few minutes to make a light diet. For example, lunch sandwiches are typical light diet foods, which are relatively time-saving. The second aspect is that in terms of the amount of food, the amount of light diet is not particularly large. The main purpose is to satisfy people's hunger and thirst and supplement nutrition and energy, rather than overeating and overnutrition, which is also in line with the current concept of pursuing healthy diet. The third aspect is that the light diet bid farewell to the traditional diet with big fish, big meat and high fat, but chose healthy ingredients with high protein, low fat and high fiber, which is more balanced in nutrition. It is precisely because of these characteristics of light diet that it has been favored and welcomed by the majority of white-collar workers and petty bourgeoisie. As a result, many catering franchise brands have seen this popular trend and have developed in the direction of light diet. Now all kinds of lunches, sandwiches, hamburgers, pies, etc. on the platform outside are very popular with everyone, and these are representative foods of light diet. With the further popularity of light diet, more and more catering brands are involved in the development of light diet, so there will be many food categories that conform to the concept of light diet, which brings more rich and diverse choices to our light diet.