The invention discloses rub-impact protection and rotation machinery employing the same. The rub-impact protection device mainly comprises a rub-impact vibration absorption device, a kinetic energy buffer device and an electric energy recycle device, wherein the rub-impact vibration absorption device has a good damping vibration reduction effect and high-temperature resistant characteristic. The rotation machinery interacts with the rub-impact vibration absorption device after the rotation machine is unstable, rub-impact energy is consumed, a large amount of rotation kinetic energy is transferred to the kinetic energy buffer device in a rub-impact mode and is converted to rotation kinetic energy of the kinetic energy buffer device, the kinetic energy buffer device is fixedly connected with a power generator, and the rotation kinetic energy is converted to electric energy, and the electric energy is output and is stored by a storage battery. Rub-impact fault protection can be performed on various types of rotation machinery, rub-impact development is effectively controlled, and the rub-impact damage degree is reduced.