The invention discloses an anti-falling device. The device is used for protecting an object of a user. The device comprises a connection base, protection frames composed of protection frame units, moving elastic rods and a sensing module. A folded state and an unfolded state are set between the connection base and the protection frames. The normal condition is the folded state. When the falling condition is sensed, the connection base and the protection frames are controlled to be switched from the folded state to the unfolded state, thereby realizing anti-falling protection. According to the device, collision is buffered by unfolding a protection shell, and the object is protected from direct collision with the ground. The device is exquisite and simple in design, is easy to use and can be used repeatedly.