Taking the construction project of south extension of Shunhe Expressway, Yingxiong Mountain overpass to South Ring Expressway, in Jinan city as an example, dynamic response of step blasting in rear tunnel to advance tunnel with the field blasting vibration monitoring and simulation with ANSYS/LS-DYNA, the dynamic response of the excavated tunnel to the up-step blasting of the excavating tunnel with small distance was analyzed.The results show that the X horizontal radial velocity is the largest and is close to the combined velocity in the three-direction velocity of the excavated tunnel.The vibration velocity of the excavated tunnel decreases from the back of working face to the entrance of the tunnel, and the parameters of blasting scheme should be adjusted according to the data of X horizontal radial in the field monitoring was proposed.According to the construction conditions of Jinan tunnel, the construction method of CD method is adopted, and good blasting effect is achieved by controlling the actual blasting charge of single section, hole depth, small leading pipe and composite lining supporting methods, which can provide some reference for other projects.