The so-called menstrual weight loss means that women divide their weight loss into four periods by taking advantage of the particularity of menstrual period, that is, 1-7 days after menstruation is called weight loss welfare period, 7- 14 days after menstruation is called weight loss overspeed period, 14-2 1 day after menstruation is called weight loss platform period, and 265433 days after menstruation. In these four stages, according to the body's functional status and diet, the purpose of losing weight can be achieved.