The invention discloses a dyeing device. The dyeing device comprises a workbench and a moving arm which is mounted on a cross beam at the upper part of the workbench in a sliding manner, wherein a suction nozzle which can be assembled and disassembled is mounted on the lower end surface of the moving arm, a rotating disk which can rotate in forward and reverse directions is arranged on the workbench, a plurality of dyeing bins are arranged on the rotating disk, a plurality of liquid distribution bottles are further arranged on the workbench, and the actions of the moving arm and the rotating disk are controlled by a controller arranged on the workbench. According to the dyeing device disclosed by the invention, the rotating disk is arranged, the dyeing bins are mounted on the rotating disk, the liquid medicine is sucked from the liquid distribution bottles through the moving arm and the suction nozzle which can be assembled and disassembled, through the action of a valve, the liquid medicine in the suction nozzle can be quantitatively added into the dyeing bins, after the dyeing of cells is completed, the liquid medicine in the dyeing bins can be rapidly drained through the centrifugal force generated by rotation of the rotating disk, and the dyed cells can be prevented from being sucked away. The dyeing device disclosed by the invention can fast add and move liquid, can shorten the duration of a cell dyeing experiment, and can be widely used as a cell dyeing device.