Considering the process of digital technology adoption by construction enterprises, where imitation learning and herd effect were factored in, game theory was employed to construct both a decision model and a diffusion model for enterprise groups concerning digital technology issues. Through numerical simulation, the impact of exchange benefits, exchange intensity, and initial adoption ratio of construction enterprises on their digital technology behavior was studied, and further strategies to promote the adoption and diffusion behavior of digital technology in enterprises were explored. The result shows that the higher the exchange benefits, the more companies tend to adopt digital technology. The exchange intensity has a positive driving effect on accelerating the adoption and diffusion of digital technology. The higher the initial adoption ratio, the more effective it is in promoting the widespread formation of digital technology adoption decisions.