Electric large capacity picture displaying machine

The utility model relates to a picture displaying machine. The two ends of a roller shutter are respectively winded on a roller shutter shaft; the motor is connected with a bidirectional clutch shaft via a leather belt; the upper part of the bidirectional clutch shaft is hinged with bidirectional clutch wheels; the two sides of the bidirectional clutch wheels are respectively provided with output driving wheels of the bidirectional clutch; the roller shutter shaft is connected with the bidirectional clutch shaft via the leather belt; the two ends of the control rod of the clutch can be respectively connected with bidirectional clutch wheels and normally open relay; control circuits is composed of a power switch, a normally open relay, a motor, a normally closed relay and a speed governor. The utility model has large picture capacity, which can be rotated forward and backward, and has selectivity.