The invention discloses a safe stair railing. A chain transmission cavity is formed in each stair railing body and internally provided with a rotating chain, and each chain comprises 4-6 T-shaped connecting hooks. Each stair railing body is further internally provided with a T-shaped sliding block sliding groove communicating with the corresponding chain transmission cavity. Clamping grooves communicating with the corresponding sliding block sliding groove are formed in the two ends of each stair railing body correspondingly. A safe sliding block and a goods sliding block both connected with the connecting hooks of the corresponding chain are arranged in each sliding block sliding groove and slide in the sliding block sliding groove. Each safe sliding block is provided with a semicircular safe supporting rod. Each railing connector is internally provided with a connector inner cavity corresponding to the sliding block sliding grooves, and two rows of rollers allowing the safe sliding blocks and the goods sliding blocks to pass are further arranged in each connector inner cavity. The safe stair railing is simple in structure, convenient to operate, and capable of further protecting the safety of people climbing a stair in the stair climbing process.