Pumpkin can be used as a staple food to lose weight in the process of diet, because pumpkin contains ingredients that can lower blood sugar and promote insulin secretion, which is helpful to lose weight. The reason why pumpkin is used as a staple food to lose weight is because the calories of pumpkin are lower than that of rice. Pumpkin is also rich in dietary fiber, which can increase a strong sense of satiety, promote digestion and promote smooth defecation. Pumpkin also has the functions of protecting digestive tract mucosa, treating digestive tract ulcer to some extent, adhering cholesterol and preventing arteriosclerosis. This is because there are 7% ~ 17% pectin in pumpkin fruit, which has strong adsorption capacity and can combine and eliminate bacteria and their toxic substances in human body. Physiological active components such as alkaloids, trigonelline and cucurbitacin can catalyze the decomposition of nitrosamines, which is beneficial to expel toxins from the body and improve cellular immunity. Unsaturated fatty acids contained in pumpkin can relieve constipation, induce diuresis and help to lose weight.