Traditional intervention methods for fear-related psychological disorders (such as specific phobia and post-traumatic stress disorder) are challenged by drug dependence and insufficient cultural adaptability. Music therapy, with its non-invasive nature and cross-cultural potential, has emerged as a new option, but there is still a gap in the integration of its mechanisms and the fusion of traditional Chinese and Western medical theories. Through a systematic review of recent studies, this paper proposes an integrated model of“Five Elements Music - Neural Plasticity”, which for the first time links the frequency characteristics of the Chinese Yu mode music (40~80 Hz) with the regulation of neurotransmitters (5-HT, GABA) and the functions of the limbic system (amygdala, hippocampus). This paper further constructs a ternary model of“frequency - neurotransmitter – emotion”, providing evidence-based guidance for the setting of music parameters, and proposes the neural mechanism by which group intervention alleviates social anxiety through the mirror neuron system. This paper provides theoretical basis and practical guidance for the standardized treatment of fear-related psychological disorders with music therapy.