The invention discloses a double-driving lifting mechanism which comprises a mechanical power driving lifting mechanism and a hydraulic power driving lifting mechanism at the same time. The two power driving lifting mechanisms can work independently or at the same time. According to the double-driving lifting mechanism, when either of the driving lifting mechanisms is in fault, the other driving lifting mechanism can be in a main driving state immediately, and continuous working of the lifting mechanism is achieved. Meanwhile, when either of the driving lifting mechanisms works under the main driving state, the other driving lifting mechanism can be used as a safety protecting device automatically to protect the lifting mechanism, and the reliability and the safety of the lifting mechanism are improved.