Abstract: The uterus is the female′s most important internal reproductive organ.The uterus is not the same as the viscera. It also has the features of the Zang and Fu. It both leaks and hides. It is also called the extraordinary Fu. However， the ancient uterus is different from the current uterus， which includes the uterus of modern medicine. According to current medical knowledge， the ovaries and the uterus are each other′s important organs. Specifically， the uterus is like a slightly flat， inverted pear， with a thick wall， with morpholigical hollowness like Six Fu. Functionally， the uterus periodically produces and discharges menstruation， sometimes hiding. But the function of the uterus is to exclude menstruation， lochia， fetal delivery. The majority of its functions are based on the Six Fu. It can be called extraordinary Fu-organ.