The invention discloses a walking-assisting lifting mechanism for old people going upstairs. The mechanism comprises a control box, wherein a first transmission rod and a second transmission rod are arranged in the control box, front columnar frames are symmetrically arranged on the two sides of the control box, front auxiliary supporting legs are arranged on the front faces of the bottoms of the front columnar frames, first lead screws are arranged in the front columnar frames and are connected with the first transmission rod, first lead screw nuts are arranged on the first lead screws, front supporting feet are arranged at the bottoms of the front columnar frames and connected with the first lead screw nuts, rear columnar frames are arranged on the back faces of the front columnar frames, rear auxiliary supporting feet are arranged at the bottoms of the rear columnar frames, second lead screws are arranged in the rear columnar frames, a third transmission rod is connected with the second transmission rod. the second lead screws are connected with the third transmission rod, second lead screw nuts are arranged on the second lead screws, and rear supporting legs are arranged at the bottom of the rear columnar frames and connected with the second lead screw nuts. Through the arrangement of the overall structure, the mechanism has the advantages of being good in stability, high in safety, simpler in structure, lower in price and convenient in use and popularization.