Greenhouse curtain rolling machine

A roller for greenhouse contains a box and a motor, wherein, the box is provided with a transmission box and a output axle that is connected with the rolling axle, which is characterized in that the output axle is provided with a worm gear, a transmission axle that is vertical to the output axle is positioned above the worm gear, the transmission axle is provided with an axial bond and is enclosed with a sliding worm, an end of the sliding worm is provided with a ring groove, the groove is provided with a shifting fork that controls the movement of the sliding worm, the shifting fork is connected with the shift handle positioned on the box, the transmission axle positioned at the external side of the transmission box is provided with a belt pulley that is connected with the motor via a belt, the box is provided with a control switch that control the positive and negative rotation and stop of the motor, a manual handle is positioned at the external end of the transmission axle; the roller is able to take automatic picking and hanging, which has convenient operation, improves the operation efficiency, saves power, has fast dropping speed and has practicability.