Novel walking aid for bone and joint patient

Provided is a novel walking aid for a bone and joint patient. Rotating sleeves rotationally sleeve the upper portion of a foreleg, a lower separation and reunion plate sleeving the foreleg is coaxially fixed to the rotating sleeves, an upper separation and reunion plate located above a lower separation and reunion device vertically slidingly sleeves the foreleg, a first connecting rod is fixed between the two rotating sleeves, a control rod located below a transverse rod and downwards inclining towards a rear leg is fixedly installed on a control shaft, a sliding frame is slidingly connected with the transverse rod, a control rack fixedly connected with the sliding frame is meshed with a control gear, a connecting gear is rotationally connected with a gear rack, a connecting rack fixedly connected with the upper separation and reunion plate is meshed with the connecting gear, and a middle rod is arranged between the connecting gear and the sliding frame. When the walking aid interactively walks and a patient