Hotline is not only the important way for the radio station to give radio broadcast and the audience to participate in the programs, but also the important form of live broadcast. At present, most of the radio station used the traditional phone coupler which is used to realize the hotline access and transfer. As the broadcast station payed more and more attention to the hotline programs, the hotline is more and more important, phone coupler equipment is difficult to meet the business requirements of radio station, so digital director system applications. The traditional hotline recording system used server to realize voice recording function. So it need high-performance server. The destruction of the Server's hardware will cause the loss of the whole file resources which is saved for hotline recording. In order to improve these deficiencies, through the analysis and study of the characteristicsof the hotline recording, the author designed the distributed hotline recording system. We used the modular design method, designed the distributed architecture. The recording system is based on the hardware sound card. The system can reduce the server load and ensure the safety of the recording files. This paper intends to design a distributed hotline recording system by the combination of theory and experiment.