Eating fish for weight loss usually does not lead to weight gain, but attention should be paid to the amount and method of diet. The fat content in fish is relatively low compared to meat, and the calorie content in fish is also relatively low. Proteins and unsaturated fatty acids can effectively reduce cholesterol levels, provide important nutrients for the brain, and also provide the necessary protein for weight loss, making it a recommended diet for weight loss. During the weight loss period, it is recommended that the daily intake of fish should be between 200-300 grams, which is relatively low in calories and can enhance the weight loss effect. At the same time, it is recommended to choose steaming as a cooking method, avoiding fried and other excessively greasy cooking methods, so as to still achieve the purpose of reducing calories and enhancing the weight loss effect. In addition, during weight loss, one cannot rely solely on diet; a reasonable combination of nutrition is needed to promote the body’s metabolism, which is beneficial for weight loss. In daily life, it is recommended to eat more coarse grains or green vegetables and fruits rich in dietary fiber, which can not only maintain the nutritional balance of the human body but also maintain the nutritional balance. It is recommended to combine running, playing ball, swimming, and other sports with reasonable diet, in order to achieve the purpose of weight loss and shaping at the same time.