Objective To evaluate auditory and speech development longitudinally over the first year after co-chlear implantation in prelingual deaf pediatric cochlear implant (CI) recipients .Methods Meaningful auditory inte-gration scale (MAIS) and infant-toddler meaningful auditory integration scale (ITMAIS) were used to evaluate 34 prelingual deaf children between 14 month and 5 years and 10 month before CI and 3 ,6 ,and 12 months after im-plantation .The effects of genders ,age at implantation ,and duration of post -implantation time were evaluated .Re-sults Three MAIS scores were displayed :total ,detection ,and perception .Each score from all the subjects was significantly improved than that before cochlear implantation ,and still getting further better with CI use(P<0 .05) . There was no significant difference between scores of males and females (P>0 .05) .Conclusion After cochlear im-plantation ,a significant increase in auditory capability occurred ,especially in the first 3 months .The factor of gen-der was no influence on auditory development .These results provide preliminary validation of MAIS/IT -MAIS for evaluation of pre -lingual deaf pediatric CI recipients .