Side guide device for cold-rolled steel strip slitting line

The utility model discloses a side guide device for a cold-rolled steel strip slitting line, which comprises a support platform, two side guide pieces are fixed on the support platform, a cutting piece on the slitting line is positioned between the two side guide pieces, each side guide piece comprises two vertical first cylinders, the first cylinders are fixed above the support platform, and the first cylinders are fixed above the support platform. A first fixing block is fixed to an output shaft of the first air cylinder, a sliding shaft is arranged on the first fixing block in a sliding mode, side guide plates are fixed to one end of the sliding shaft, the two side guide plates on the guide piece on the same side correspond to each other, springs are connected between the side guide plates and the first fixing block, and displacement sensors are installed on the sides, close to the first fixing block, of the side guide plates. A second air cylinder extends to enable a second fixing block to be separated fr