Theater is a place for all kinds of performing arts, and its design and function are usually diversified to meet the needs of different types of performances. odeon software is calculated with the sound source method and sound line tracking method, and adopts the Lambert scattering algorithm to calculate the sound diffusion, so that the simulation process is more and more realistic, and the calculated results are closer to the actual measured values. using odeon software to simulate the Using ODEON software to simulate the Guangzhou Design Capital - Design Hall Theater, according to the simulation results, the reverberation time is relatively short and other issues such as corresponding adjustments and recommendations, to give the Guangzhou Design Capital - Design Hall Theater indoor sound-absorbing material layout plan.