In order to reduce the vibration impact of tunnel blasting on adjacent structures and improve the quality of tunnel blasting, a new method for evaluating and optimizing adjacent existing structures tunnel blasting schemes is proposed based on numerical simulation and nonlinear fuzzy analytic hierarchy process (FAHP). Firstly, the method uses Midas/GTS NX software to apply the equivalent blasting time-history load of the blasting plan to the excavation profile for dynamic response analysis. Combined with blasting vibration safety criterion, the vibration influence of simulated monitoring points is evaluated and vibration control parameters are optimized. Secondly, the blasting parameters that meet the vibration speed control standards are comprehensively evaluated for rationality using nonlinear FAHP, and the index parameters that affect the evaluation results are optimized. Finally, the rationality criteria of each stage met the blasting parameters determine the blasting scheme. In engineering applications, the solution optimized by this method reduces the maximum dose of the original solution by 25%, and the peak value of the simulated vibration velocity at the measuring point is therefore reduced by 41.2%. After implementation of the solution, the attenuation trend and peak size of the on-site monitoring and simulation results are basically the same. Effect of light blasting meets the relevant technical requirements of smooth blasting, which verifies the rationality of the evaluation criteria established at each stage of the method and the feasibility of program evaluation and optimization.