The invention discloses a yin and yang water cup. The yin and yang water cup comprises a cup body, a first cup lid and a second cup lid. An inner cavity is formed in the cup body, and a partition plate is arranged in the inner cavity. The partition plate and the cup body are integrally formed, and the inner cavity of the cup body is divided by the partition plate into a first containing cavity and a second containing cavity which are formed vertically. The two ends of the cup body are provided with a first opening communicated with the first containing cavity and a second opening communicated with the second containing cavity respectively. The first cup lid is matched with the cup body to seal the first opening. The second cup lid is matched with the cup body to seal the second opening. The partition plate is arranged in the inner cavity of the cup body to divide the inner cavity into the first containing cavity and the second containing cavity which are formed vertically, and the two ends of the cup body are provided with the first opening communicated with the first containing cavity and the second opening communicated with the second containing cavity respectively; during use, two kinds of different beverages can be poured into the first containing cavity and the second containing cavity respectively through the first opening and the second opening to meet the use requirements of users.