In Chinese piano teaching practice, the importance of auditory perception of music has been neglected, so that in piano performance and teaching, many people play music that lacks personality and emotional experience. This paper proposes an auditory perception model based on wavelet packet domain based on the acoustic properties of the human ear. The model analyzes the acoustical perception characteristics of piano audio signals through wavelet transform, and introduces adaptive wavelet packet decomposition into the calculation of the auditory perception model to simplify the calculation of the model, so that the obtained auditory masking threshold is closer to the actual value. Finally, the acoustic perception model is practically applied to piano teaching to verify its effectiveness. And the traditional Chinese music elements of Gong, Zheng and Shang were infiltrated in piano teaching. The results showed that the model detected the 3rd harmonic g1 with root tone C, whose frequency peak was most prominent at 397.25 Hz, and the sound pressure value reached 39.50 dB, indicating that the auditory perception ability directly affects the musical expression and creativity. This study cultivates students’ musical auditory perception ability, which significantly improves piano playing ability.