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Objective In order to facilitate the research of new cochlear implant algorithm and to develop inexpensive cochlear implant device based on mobile phone，this paper proposed a design of a portable cochlear implant research platform system with wireless transmission function based on mobile phone.Methods At first，this system embedded the programs such as audio signal acquisition，cochlear implant speech coding and processing algorithms，then implemented wireless data transmission with the coding and modulating hardware unit through Wi-Fi function.Finally，the coding and modulation hardware unit output RF signals according to specific coding and modulation protocols，the output signals were sent to the implanted part through a transmitting coil.Results After evaluating the processing results and testing the output RF signals，we verified that this system had the capacities of processing audio signals with cochlear implant strategy accurately，adjusting cochlear implant parameters，and controlling the coding and modulating hardware units to send the right modulated RF signals according to the specific protocols.Conclusions This system provides an effective research platform for the development of new cochlear implant algorithms and personalized cochlear parameter tests.