Embodiments of the invention relate to the technical field of audio processing, and disclose an audio file generating method and apparatus, and a terminal device. The method comprises the steps of recording an external human voice to obtain a sound file; converting the sound file into text content; performing a semantic analysis on the text content to obtain an emotional feature corresponding to the sound file; obtaining background music and sound effects adapted to the sound file based on the emotional feature; and adding the background music and sound effects to the sound file to obtain an audio file. By implementing the embodiments of the invention, the background music and sound effects are added to the sound file by combining the emotional feature of the sound file so as to enhance the auditory experience of the audio file.