Curtain driving device

The invention discloses a curtain driving device which comprises a supporting unit, a hoisting unit and a driving unit, the supporting unit is used for hanging a curtain and has a first motion state and a second motion state, when the supporting unit is in the first motion state, the supporting unit is used for unfolding or folding the curtain, and when the supporting unit is in the second motion state, the supporting unit is used for lifting the curtain. And when the supporting unit is in the second motion state, the supporting unit is used for winding or unwinding the unfolded curtain. The curtain driving device has the beneficial effects that the functions of unfolding, folding and rolling the curtain and adjusting the height of the curtain can be achieved only by arranging one driving mechanism, on one hand, the equipment cost, the electricity utilization cost and the later maintenance cost are reduced, and on the other hand, the structure of the whole curtain driving device is smaller and more exquisite;