Abstract: The present invention discloses an elastic side bearing assembly system for railway vehicles, including a side bearing body, a side bearing seat, a first ball hinge assembly, a connecting rod and a second ball hinge assembly, side bearing body connected to side bearing seat via first ball hinge assembly, connecting rod and second ball hinge assembly, first ball hinge assembly provided below one end of side bearing body, second ball hinge assembly provided above side bearing seat at different end with respect to first ball hinge assembly, first ball hinge assembly connected to second ball hinge assembly via connecting rod; side bearing springs provided between side bearing body and side bearing seat, stoppers provided above side bearing seat, and side bearing springs connected to side bearing body and side bearing seat respectively by extending through stoppers; a side bearing wear plate provided above side bearing body.