Grounding round steel fracture marking device

The utility model relates to the technical field of marking equipment, in particular to a grounding round steel fracture marking device, which is characterized in that a handle is held by hand to enable a fixing frame to be close to grounding round steel to enable a stabilizing head to be contacted with the surface of the grounding round steel, and then a motor is started to drive a gear to drive so as to enable a sliding block to slide in a sliding groove; meanwhile, pigment is sprayed to the surface of the grounded round steel from the spray head through the spraying mechanism, the circular ring reciprocates to form a circle, so that the sprayed mark forms a standard circular ring on the surface of the round steel, the quality is good, and the pigment tank can be easily replaced through the fixing mechanism; comprising a spraying mechanism, a pigment tank and a discharging pipe, the pigment tank is installed at the top of the spraying mechanism, and the discharging pipe is arranged at the output end of the