Balance shaft marking gauge

The utility model discloses a balance shaft marking gauge which comprises a bottom plate, a workpiece tray, a guide rail, a support and a detection assembly, and the guide rail and the support are both located on the bottom plate; the workpiece tray is connected with the guide rail in a sliding mode, and the support can move in the vertical direction relative to the bottom plate. The detection assembly comprises a positioning plate and a detection part, and the positioning plate is detachably connected to the lower portion of the support; at least one positioning pin is arranged below the positioning plate and is used for positioning a workpiece; the detection part is vertically fixed on the positioning plate, and a detection window is formed in the detection part. According to the utility model, rapid debugging and rapid detection of marking can be realized, and detection inconvenience and time waste caused by the fact that a detection reference and a detection point are not on the same plane are avoided. 本实