Abstract: Referring to the figure, structure and volume of a cave-style ancient stage among the Chaoshan Temple in Shanxi, five ancient stage models have been built. The computation space is 14.42m×15.68m×5.88m. Considering the wall's materials in the ancient stage, the models' boundary consists of rigid boundary and PML absorbing boundary conditions. Through the Finite-difference Time-domain method by using the MATLAB software, impulse responses of the receiving points in the five models have been calculated, which have been in spectral analysis. The results show that cave-style ancient stages can strengthen the sound's definition, satiety and sense of reverberation and so on, which can amplify sounds at some frequencies.