According to the perception and adaptive interactive features of information diffusion under the environment of Internet of things,with social physics ideas and vibration propagation concept, the dynamics variables of information diffusion in Internet of things and their corresponding effects on propagation behavior are defined and an information diffusion microscopic dynamics model is constructed based on the damped vibration equation．The Multi-Agent simulation technology and Netlogo simulation platform are employed to simulate the dynamic relationship between the microscopic individual propagation behaviors and the macroscopic overall operation mechanism. The rationality of the model is verified with a large number of numerical simulations．The nonlinear evolution rule of information diffusion system is analyzed based on the simulation results,and the corresponding strategies are proposed.