The invention provides a copper-free early warning mechanism, which comprises a copper sheet coil coupled to a hair planting machine, and further comprises a copper sheet early warning mechanism for judging the working state of the copper sheet coil, wherein the copper sheet early warning mechanism comprises an index plate which is rotatable in a mode of being synchronous with the copper sheet coil and a proximity switch which is arranged in a mode of corresponding to the index plate; the proximity switch is connected to an alarm end; and the proximity switch is used for judging whether it needs to alarm in accordance with the rotating state of the index plate. The invention also provides the hair planting mechanism made from the copper-free early warning mechanism. The early warning mechanism disclosed by the invention is low in cost, and the generation of copper-free bad toothbrushes can be avoided.