The invention discloses rehabilitation parallel bars. The parallel bars comprise two groups of parallel arranged horizontal bars with adjustable heights. The horizontal bars comprise bottom seats, first supporting frames and second supporting frames which are arranged on the bottom seats in the vertical directions and holding rods arranged on the the first supporting frames and the second supporting frames. The first supporting frames and the second supporting frames comprise fixing frames fixed on the bottom seats and lifting frames capable of slidably arranging in the height directions of the fixing frames, and the holding rods are arranged on the lifting frames. The horizontal bars further comprise manipulating mechanisms for manipulating one of the lifting frames of each of the first supporting frames and the second supporting frames to perform lifting movement and linkage mechanisms for synchronously connecting every two lifting frames, and the every two lifting frames can be lifted or lowered synchronously by the connection of the linkage mechanisms, so that when one of the lifting frame is manipulated to move up and down, the two supporting frames can be synchronously liftedand lowered. According to the rehabilitation parallel bars, the adjustment is convenient and fast, the stability is good, and the holding rods are maintained parallel in the adjusting process to avoid damages on the holding rods.