Chinese astrology is the divination of the future from the Chinese calendar, which is based on astronomy, and ancient Chinese philosophy. In particular, it is based on the sexagenary cycle of 60 years that has been documented since at least the time of the Shang Dynasty. This basic cycle has been constructed from two cycles: the 10 heavenly stems (the five elements in their yin and yang forms) and the 12 earthly branches, or the 12-year cycle of animals referred to as the Chinese zodiac. The Chinese animal zodiac also operates on a cycle of months or 'moons' and of hours of the day.

The Chinese zodiac refers to a pure calendrical cycle; there are no equivalent constellations like those of the occidental zodiac. In imperial times there were astrologers who watched the sky for heavenly omens that would predict the future of the state, but this was a quite different practice of divination from the popular present-day methods.