Automatic uncoiling device of packaging paper disc

The invention discloses an automatic uncoiling device of a packaging paper disc. The automatic uncoiling device of the packaging paper disc comprises a coiling drum, a sliding guide rail, a sliding block, a driving source, a cylinder, an uncoiling mechanism, a support, a negative-pressure sucking disc and a negative-pressure pump, wherein a paper disc installation position is on the periphery of the coiling drum; the sliding guide rail guides the paper disc installation position from far to near; the driving source drives the sliding block to slide on the sliding guide rail; the support is fixedly connected to the sliding block; the cylinder is installed in the middle of the support; the uncoiling mechanism is fixed to the upper part of the support; the uncoiling mechanism comprises a guide roller, a sucking disc swinging arm, a pressing roller, a pressing arm and a fixed block; the negative-pressure sucking disc is installed on the upper end surface of the sucking disc swinging arm; the negative-pressure pum