The invention discloses a disassembling device for spinning assemblies. The disassembling device comprises a bottom plate, an upright column, a slide plate and a mechanical arm. The upright column is mounted on the bottom plate, the slide plate and the mechanical arm are mounted on the upright column, the mechanical arm is fixed onto the upright column by the aid of the slide plate, a winch is connected to the bottom of the mechanical arm by a movable pulley mechanism and is fixed onto the slide plate, the mechanical arm comprises a primary rocker arm mechanism and a secondary rocker arm mechanism, the primary rocker arm mechanism is connected with the secondary rocker arm mechanism by a rocker arm connecting shaft, a bearing is arranged in the rocker arm connecting shaft, an end adjusting mechanism is connected to an end of the secondary rocker arm mechanism, a screwing rod is penetratingly connected into the end adjusting mechanism, a tray is connected to the top of the screwing rod, and a ratchet wrench is connected to the bottom of the screwing rod. The disassembling device has the advantages that the spinning assemblies can be lifted by the disassembling device instead of being manually lifted and can be mounted and detached under the swinging actions of the mechanical arm, accordingly, the labor intensity can be effectively relieved for operators, the spinning assembly detaching and mounting efficiency can be improved, the production safety can be guaranteed, and labor and materials can be saved.