The invention discloses a base walking mechanism of an oscillation bearing testing system. The base walking mechanism comprises base tracks and a base frame body, wherein the lower surface of the base frame body is provided with walking wheels and clamped track fixing devices; the walking wheels are driven by a walking wheel driving device; the base frame body moves back and forth along the base tracks by the walking wheels; the clamped track fixing devices are driven by a hydraulic driving system to clamp the base tracks or loosen and move away from the base tracks. According to the invention, the practicability of a phase-to-phase spacer oscillation bearing testing system can be enhanced; the base is used for regulating the mechanism; the need of testing experiment of phase-to-phase spacers with different lengths of the oscillation bearing testing system can be met; meanwhile, the base walking mechanism has good locking and fixing functions.