Quantum dense coding property of Heisenberg XYZ model with abundant interaction of various parameters in a time-varying magnetic field is studied in this paper. The evolution of channel capacity χ over time is simulated by Quantum State Diffusion Method (QSD). Numerical simulation shows that quantum dense coding depends on the environmental correlation coefficient γ, coupling coefficient J,Jz and the intensity B of cosine magnetic field. When the environment correlation coefficient γ variable small, that is, the non-Markov characteristic increases, the channel capacity χ of quantum dense coding obviously increases. Here it is worthwhile to propose that smaller coupling coefficients Jz, larger coupling coefficients J, and stronger time-varying magnetic field intensities B all are very useful for efficient quantum dense coding in this system, where it is very obvious in the case of non-markov, which is in turn very important for efficient information transmission.