The invention belongs to a civil aircraft braking system low-temperature testing technology, and relates to a method for eliminating hydraulic vibration in braking system tests. The method relates toa damping oil conveying pipe, an adjustable skeleton and a damping bracket; the damping oil conveying pipe adopts a coaxial three-layer stainless steel pipe, and comprises an outer-layer pipe, a middle-layer pipe and an inner-layer oil conveying pipe; the rigidity of the damping oil conveying pipe is adjusted to achieve the damping purpose; the inner-layer pipe and the middle-layer pipe are positioned by using the adjustable skeleton; the middle-layer pipe and the outer-layer pipe are positioned by using the adjustable skeleton; the damping oil conveying pipe is paved on the damping bracket, and is fixed by using a hoop; and the damping bracket is aligned by using a level when being paved on a concrete ground, and is fixed on the concrete ground. Through installation of the damping oil pipe and the damping bracket, the vibration in the braking system testing process is eliminated.