Objective To scientifically evaluate the deaf children's hearing ability, language ability and the actual level of found problems, timely adjust training contents and training, prompting rehabilitation training to achieve predetermined goals. Return to the mainstream of early realization of hearing-impaired children, equal participation. Methods The combination of objectivity and purpose, the integration of the whole and the part, the combination of qualitative analysis and quantitative analysis, static analysis and dynamic analysis. Using fuzzy comprehensive evaluation, the establishment of mathematical model. Results Quantitative indicators can make a precise assessment, identification of hearing-impaired children the auditory language and found the inherent potential and development trend, can have a definite object in view to develop a rehabilitation training program. Conclusion The fuzzy mathematics and mathematical model is introduced to rehabilitation for hearing-impaired children in the field, can make scientific rehabilitation training, can achieve the best rehabilitation effect in the shortest time, the rehabilitation assessment to avoid the deviation caused by human factors, improve the reliability and validity of the assessment. Hope that the peer can will of game theory and probability theory, stochastic process, stochastic differential equation introduced rehabilitation for hearing-impaired children in the field, and strive to China Rehabilitation for hearing-impaired children in the forest of world rehabilitation can occupy a space for one person.