本文采用插值格子-Boltzmann方法对较大Ra数范围下的二维Rayleigh-Bénard对流进行了模拟研究．模拟中针对不同的Ra数,采用不同的插值比．模拟获得了系统的最大垂直方向速度分量随时间的变化规律、系统的流线以及等温线分布、Nu数与Ra数的变化规律以及壁面附近水平截面平均温度的分布．模拟结果与相关文献数据傲了对比,相互吻合良好． In this paper, we investigate the two-dimensional Rayleigh-Bénard convection in a large range of Ra by interpolation-Boltzmann method. Simulation for different Ra number, using different interpolation ratio. The variation law of the maximum vertical velocity component of the system over time, the distribution of streamlines and isotherms, the variation law of Nu number and Ra number, and the average temperature distribution of the horizontal section near the wall were obtained. The simulation results are in good contrast with the relevant literature data, and are in good agreement with each other.