Abstract: To accurately locating the boiler tube leakage point, numerical simulation was conducted on the flow field and sound field formed by the leakage jet flow. The Chan algorithm in communication engineering was introduced to the location detection of boiler tube leakage, and test studies were made respectively under open environment, laboratory environment, simulated cool furnace noise-free environment and simulated cool furnace high-noise environment. Results show that the axial velocity of leakage jet flow is the main reason of leakage sound propagation and disturbance, and the noise radiation has directive property in the far field. The sound power level of leakage flow near jet exit is the highest, which decreases with the rise of distance to the jet exit along symmetrical axis. The intensity of sound field increases with rising pore diameter of leakage flow. The sound power level is basically the same under same pore diameter but different steam conditions. The location error of Chan algorithm is within the allowable range, indicating high resolution of the algorithm.