A scan driving circuit and a device are disclosed. The scan driving circuit has a plurality of scan driving units coupled in cascade. A (N)-cascaded scan driving unit includes a first control module, a second control module, and an output module. The second control module includes a first switch unit, a second switch unit, a potential holding unit and a first switch control unit. A control end of the second switch unit receives the (N-1)-stage scanning signal, the first switch control unit is configured for controlling the first switch unit, according to the second clock signal, the (N-1)-stage scanning signal, the (N-2)-stage scanning signal, and the first constant voltage signal passed through the second control end of the first switch unit, to control the first switch unit, for operating that the first switch unit and the second switch unit are not conducted at the same time.