The utility model discloses a postoperative walking aid for cardiothoracic surgery. Supporting rod, the number of the supporting rods is four. the supporting rods are fixedly connected through a fixing rod; the number of the fixing rods is three. a drainage bottle placing box and a medicine placing box are fixedly mounted on the fixed rod and the symmetrically arranged fixed rod respectively; a grabbing supporting rod and a front arm supporting rod are connected to a pipe connector fixedly installed at the upper end of the supporting rod, the front arm supporting rod is located over the drainage bottle containing box and the medicine containing box, and an infusion hook is arranged on an infusion extension rod fixedly installed at the upper end of the pipe connector. By arranging the anti-skid sleeve, the forearm supporting plate, the drainage bottle containing box, the semi-arc fixing protection sleeve and the shock absorption anti-skid pad, the problems that a movable support is notfirm in movement, a drainage bottle does not have a containing position, an infusion tube is prone to falling off, and lifting assistance is inconvenient are solved.