By taking a shallow tunnel in the Fengtan railway line as the research object, based on the finite ele- ment software ABAQUS, this study conducted the three dimensional numerical analysis of the influence of adja- cent small tunnel blasting vibration on the deformation of close-spaced hydraulic tunnel in light of two aspects including the tunnel monitoring point displacement and the vibration velocity. The results are as follows: com- pared with the single pilot tunnel, the blasting of the pilot tunnels has more influence on the vault of the existing hydraulic tunnel, and the peak value of blasting load has great influence on the displacement of the existing hy- draulic tunnel and the velocity of particle vibration; the displacement of the lining vault is greater when the blasting vibration is detonated at the top of the hydraulic tunnel, and the position of blasting pilot tunnel affects the displacement of existing hydraulic tunnel and vibration velocity of particles.