Cochlear implants are now established as the treatment of choice in the rehabilitation of children with bilateral profound sensori neural hearing impairment. This study objective is to analyze and the development of auditory skills for the cochlear implantation children. This study included 50 children attending the Therapy centre, Tiruchirappalli. Their age ranged below 24 months. All children had bilateral sensori-neural hearing loss since birth. None of the subjects had prior Cochlear implant, but all had tried conventional hearing aid. All subjects were implanted unilateral and bilateral, sequential/simultaneous with CI devices including MED EL and Nucleus. All met the criteria of cochlear implant. All items of the studied auditory skills improved significantly by time. There is significant improvement between 4 to 8 months in the scores of detection, discrimination, identification and comprehension skills. Significant improvement in comprehension is also found between 10 and 11 months interval. PAS score had weak negative correlation with age. Children fitted with cochlear implants showed significant improvement in acquisition of auditory skills over a period of below 1year. The age and the side of the implant are the most significant factors.