The invention discloses a method for isolation correction of a roadbed for the bridge piers of a high-speed railway on the premise of protection of surrounding existing buildings. According to the method, before correction of the bridge piers of a high-speed railway, a barrier structure is longitudinally arranged at the lateral excursion side of the roadbed for the bridge piers of the high-speed railway along the railway and between an existing building and the roadbed for the bridge piers, and the barrier structure can prevent stress produced in construction of jet-grouted piles from transmitting to the foundation of the existing building; and then high-pressure jet-grouted piles are used for correction of the bridge piers of the high-speed railway. The method has the advantages of simple structure and convenient application; and since a row of the barrier structure capable of preventing stress produced in construction of jet-grouted piles from transmitting to the foundation of the existing building is arranged between the roadbed for the bridge piers and the existing building, damage to the foundation of the existing building caused by stress diffusion in the process of construction of the high-pressure jet-grouted piles is effectively avoided.