To provide a device for regulating a loosened coil of circular knitting machine, wherein the device for regulating loosened coil refers to a knockover cam of a cam box.

The device for regulating a loosened coil of circular knitting machine includes at least a knitting needle set on a circular knitting machine and intended for drawing knitting lines on the circular knitting machine. The device also includes a cam box for supporting the circular knitting machine and a driving device set on the cam box, the cam box has an association mechanism, a slide in association with the mechanism, and a knockover cam fixed onto the slide and intended for guiding the knitting needle, there is a first pinion on the above mechanism, wherein the slide has a second pinion corresponding to a first gear. In the device, the association mechanism driven by the driving device functions to associate and shift the slide by engaging the first gear and a second gear at the slide with each other.