The invention discloses a transverse galling machine and a galling treatment method. The transverse galling machine comprises a walking frame moving the back forward along the longitudinal length direction of a to-be-galled area, a work rack mounted on the walking frame, a transverse move frame that is laid on the work rack and can make leftward and rightward transverse movement on the work rack, a transverse move driving mechanism driving the transverse move frame to do leftward and rightward transverse movement, and a galling tool that is driven by the transverse move frame to do leftward and rightward transverse movement synchronously and conducts transverse galling treatment on a to-be-galled area in the leftward and rightward transverse movement process. The galling treatment method includes: 1. determination of the galling treatment time: determining the galling treatment time of the to-be-galled area; and 2. transverse galling treatment, which consists the process of: 201. putting the transverse galling machine in place; and 202. carrying out transverse galling treatment. The transverse galling machine and the galling treatment method provided by the invention have the advantages of reasonable design, convenient realization and good use effect, can simple and rapidly complete the transverse galling treatment process of the to-be-galled area, and have good galling treatment effect.