A protective apparatus for sound-absorbing particles (4) in a sounding apparatus, comprising a housing (1) and a rear acoustic cavity formed inside the housing (1). The rear acoustic cavity is filled with sound-absorbing particles (4). A sound circulation channel (5) communicating the rear acoustic cavity with the outside is provided on the housing (1). A sound transmission layer (3) used for preventing the sound-absorbing particles (4) from being exposed covers an entrance of the sound circulation channel (5). The sound transmission layer (3) of the protective apparatus separates the sound circulation channel (5) from the rear acoustic cavity, such that airflow in the rear acoustic cavity passes through the sound transmission layer (3) and then flows out of the sound circulation channel (5). Configuration of the sound transmission layer (3) can hinder the sound-absorbing particles (4), prevent the sound-absorbing particles (4) from entering the sound circulation channel (5), and do not influence outflow of airflow. The problem in the prior art that sound-absorbing particles (4) are easily exposed or block a sound circulation channel (5) is solved, and the quality of a sounding apparatus is ensured.