▎ 摘　　要

NOVELTY - Preparing coating for screw thread, comprises providing workpieces with screw thread, pretreating the screw thread part of workpieces with screw thread; sandblasting the workpiece with the screw thread after pretreatment; preheating the workpiece with screw thread after sandblasting; coating the screw thread of preheated workpiece with screw thread with antibiting material, antibiting material includes resin as a solvent and carbon material as solute, cooling and forming an antibiting coating on the surface of the screw thread. USE - The method is useful for preparing coating for screw thread. ADVANTAGE - The method: can at least alleviates the problem that frequent disassembly occurs and the sticky snapping hinders disassembly; and is simple and economical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for workpiece with screw thread, comprising: workpiece body and screw thread provided on the workpiece body, antibiting coating is formed on the surface of the screw thread, and the antibiting coating is prepared by above mentioned method.