The study on the disturbance degree of tunnel construction to scenic spots′ environment and the environmental feasibility of tunnel engineering are of great significance. As a result, five indices, i. e. noise pollution, dust pollution, solid waste pollution, wastewater pollution and human landscape architecture deformation, are selected to establish an environmental assessment index system for scenic spots. The subjective and objective weights of the index are integrated by combination weighting method of game theory. And then the shortcomings of the traditional Nemerow index method in the environmental assessment of scenic spots are modified, and the impact assessment model of tunnel construction on scenic spots environment is constructed. The model is applied to evaluate the impact of tunnel construction on Laolongtou scenic area based on the measured data of the tunnel section K1+500~+930. The results show that the influencing grade of tunnel construction on scenic spots environment is grade Ⅱ, which indicates that the construction of Laolongtou Tunnel has little influence on the scenic spot environment and the environmental feasibility of the project is good.