Abstract: In order to ensure that the transportation capacity of the main coal flow transportation system of Majiliang Coal Mine matches the new level of coal production capacity, the transportation capacity of the main coal flow system of Majiliang Coal Mine is improved by increasing equipment power, increasing bandwidth and improving equipment stability. All aspects of the project are optimized in order to achieve the minimum amount of production, the least investment, and the shortest construction period. The research results show that the transportation capacity of the main coal flow transportation system will be increased from 1 100 t/h to 1 800 t/h, the annual transportation volume will increase by 3.9 million tons, and the annual sales will increase by 1.5 billion yuan. The scheme is optimized, and the period of shutdown and reconstruction is shortened from 112 days to 50 days. The use of advanced equipment such as perfect harmonicless high-voltage inverter not only improves the stability of equipment operation, but also has good economic benefits. After the transformation of the main coal flow transportation system, the single-month raw coal transportation The volume exceeded 900,000 tons, and the volume of the main coal flow transportation system increased by 60% year-on-year.