Broken paper winding prevention roller structure and coating system

The utility model provides a structure for preventing broken paper from winding a roller, which comprises an air blowing device arranged above a coating back roller, the air blowing device is externally connected with a compressed air source, the air blowing device comprises a fixing assembly, an air blowing assembly, a guide assembly and an induction assembly, the air blowing assembly is arranged on coating equipment through the fixing assembly, the air blowing assembly is connected with the compressed air source, and the guide assembly is connected with the induction assembly. The guiding assembly is arranged on the blowing assembly and used for guiding the blowing direction of the blowing assembly, and the sensing assembly is used for sensing whether the coating equipment breaks paper or not; and after the induction assembly induces the broken paper, the blowing assembly acts to blow air to the coating back roller so as to prevent the broken paper from winding the coating back roller. The utility model pro