Language discrimination training is based on auditory arousal (sound stimulation), and the ears can synthesize and analyze the perceived sounds before proceeding. It is the advanced stage of listening training. It is necessary for deaf children to listen more, especially to combine situations, events and listening, so that deaf children can combine various senses such as vision, touch and hearing to expand their understanding of language. In the later stage of language training, in order to cultivate deaf children's listening ability (that is, engagement index) in downtown areas, deaf children can be trained in language discrimination from noisy environments to improve their language acceptance rate, language discrimination rate and language intelligibility.