Acoustic pyrometers still have such problems as insufficient probe temperature tolerance, poor temperature measurement stability, and susceptibility to the impact of airflow velocity. In order to improve the temperature measurement reliability of acoustic pyrometer, this paper establishes a corresponding airflow temperature field and sound propagation model in Virtual.Lab. The optimal topological parameters to reduce sound pressure level attenuation were analyzed and studied by changing the topological structure such as the acoustic probe distribution diameter, orientation, and tilt angle of an existing set of acoustic pyrometers, and experimental comparison was carried out. Finally, it was found that the topology structure with a diameter of 15 cm and an inclination angle of 30 degrees between the acoustic probe and the horizontal plane had the smallest comprehensive sound pressure level reduction value in the airflow temperature field environment with temperature from normal atmospheric temperature to 900 ℃ and Mach number from 0 to 0.3. The topology structure with a diameter of 20 cm and an inclination angle of 15 degrees took the second place. In conclusion, both topology structures reduce the standard deviation of data by more than 17% compared to existing topology structure, which improve the performance of acoustic source signal reception, therefore, improving the reliability of acoustic pyrometer temperature measurement in the airflow temperature field environment of temperature from normal to 900 ℃ and Mach number from 0 to 0.3.