The invention discloses a forging method of a coupler knuckle for railway vehicles. The coupler knuckle for railway vehicles is formed by forging, and coupler knuckle products for railway vehicles with qualified performance and size are forged by the working procedures of material preparation, heating and blank forming, die forging and forming, trimming, heat treatment, preliminary processing, heat treatment, shot blasting, fault detecting and machining. The forging method of the coupler knuckle for railway vehicles, in which the coupler knuckle for railway vehicles has compact texture, high toughness and good fatigue performance, solves the defects of air pore, shrinkage porosity, inclusion, crack, short service life and the like of the coupler knuckle of the existing cast steel vehicle coupler.