Abstract: The distribution of acoustic parameters in sound field affects the sound quality of the hall. By taking a medium sized meeting room as an example and using Odeon software, the effects of material layout and modeling on the sound field uniformity in small and medium-sized halls are simulated and analyzed under two sound sources. The results show that the arrangement of sound-absorbing materials on the back wall of small and medium-sized halls has little effect on the uniformity; the arrangement and shape of materials have a greater effect on the uniformities of early decay time (EDT) and reverberation time (T₃₀), while have little effect on the uniformities of sound pressure level (SPL), clarity (C₈₀), definition (D₅₀) and speech transmission index (STI); the sound source situation has a greater impact on the uniformities of EDT, SPL, D₅₀ and STI, but has a small impact on the uniformities of T₃₀ and C₈₀. The research results can provide references for the sound quality design and research of small and medium-sized halls.