The invention discloses a water collecting umbrella which comprises a water collecting barrel, wherein an umbrella is arranged in the water collecting barrel, a driving mechanism which drives the umbrella to move upwards along the water collecting barrel and can unfold the umbrella at the top of the water collecting barrel is arranged at the bottom of the water collecting barrel, the unfolded umbrella is in a trumpet shape, and the bottom of the unfolded umbrella is communicated with the water collecting barrel. In fine days, the umbrella is hidden in the water collecting barrel; in rainy days, the driving mechanism firstly drives the umbrella to move upwards along the water collecting barrel until the umbrella protrudes out of the top of the water collecting barrel, and then the umbrella is unfolded to be in a trumpet shape so as to receive rainwater falling down from the sky, the rainwater flows into the water collecting barrel via the umbrella, and the water collecting barrel holds the rainwater.