Abstract: Introduction This paper aims to explore the applicability of simplified dynamic calculation for equipment foundations on the ground of plant. Method Taking a typical equipment on the main building ground of a typical coal-fired power plant as an example, this paper compared the computational results of the whole frequency domain dynamic analysis and the simplified dynamic analysis and specified the specific requirements of aspect ratio for equipment foundation to use the simplified dynamic calculation. Result The results we obtained demonstrate that only when the equipment foundation aspect ratio is not less than 1.5, using the simplified dynamic calculation method can get more accurate results. Conclusion Based on the analysis of the calculation results, it can be seen that the simplified power calculation method provided by the specification is applicable to the power equipment, which is generally located in the main plant at zero meters, when the base weight is more than 5 times the machine weight and the base width and height ratio is not less than 1.5.