There is a track on the left and right sides of each set of ceiling curtain, and the aluminum alloy cloth supporting connecting rod with two T - shaped pulleys in the middle of the track penetrates through the fabric to fix the fabric at equal distances, and the first cloth supporting connecting rod is fixed on the traction pulley with screws. The motor is transversely mounted on the main transmission box of any track, and then connected to the main transmission box of the other track through an aluminum alloy synchronous transmission rod. when in use, the motor is directly driven to work forward and backward by a remote controller and a control switch to automatically drive the traction pulleys on the two track rails to automatically fold and open the awning curtain fabric. when the fabric is folded, the folding state of equal distance does not affect daylighting. when the fabric is folded, it does not affect the use of space. the track can be respectively processed into an arc shape and a straight shape according to the structure of a glass roof or a sunshine room. the fabric can be selected from shading waterproof type, sunlight transparent type or semi - shading type. It is mainly used in commercial space, glass ceiling of enterprises and institutions, glass ceiling of natatorium / leisure area of star hotels, glass ceiling of sunshine room of villas and apartments, etc.