Abstract: For a 1000 MW dual tangential circle coal-fired boiler, improper selection of the pulverized coal distributor and design flaws in its installation position lead to a series of problems affecting the unit's safety and economy, including frequent pulverized coal blockage in the transport pipes, actual boiler operating efficiency lower than the design value, and combustion deviation inside the furnace. Based on CFD numerical simulation method, the structural type and layout position of the pulverized coal distributor in the transport pipe system were optimized, and corresponding adjustment tests were carried out. The engineering application results show that the proposed optimization scheme eliminates the frequent blockage defect in the transport pipes downstream of the pulverized coal distributor; the air velocity deviation and pulverized coal concentration deviation among the branch pipes downstream of the distributor are reduced by 12.9% and 35.9%, respectively; under a load of 300 MW, the main steam temperature deviation decreases from 27 °C to 4 °C ; and within the statistical period, the maximum temperature deviation of the same water wall tube panel is reduced from 306 °C to 88°C . The above scheme has been successfully validated on four boilers at two power generation enterprises in Guangdong Province, China. It provides significant reference for solving the problems of low economy and safety reliability caused by uneven primary air and pulverized coal distribution and combustion deviation in similar boiler types, and can also serve as a technical reference for deep peak-shaving retrofitting of analogous boilers.