Abstract: In order to improve the operating efficiency and ash removal effect of coal-fired boilers, this paper proposes a method for removing ash from the heat transfer surface of boilers based on acoustic frequency regulation. By using acoustic spectrum analysis, simulation, and adaptive control technology, the optimal acoustic frequency is determined and precise control and directional emission are achieved, significantly improving the efficiency of ash removal and boiler heat transfer performance. The experimental results show that the adaptive control mode performs well in improving ash cleaning rate, energy consumption, and heat transfer.