设计了一种基于Altera FPGA的音乐播放器，能够实现从SD卡中读取所有音乐文件，并通过开发板送至DAC数模转换器并播放出音频文件。本设计基于SOPC技术，使用Nios2软核处理器实现，包括软硬件设计两个部分。硬件部分主要负责对SD卡控制器的ip核编写及调试，实现硬件所需功能。软件部分主要负责对SD卡按时序进行音频文件的读取操作以及音频信息的输出。同时，制作了一个小型的音乐播放模块，实现音乐的播放。最终作品基本满足要求。-Altera FPGA-based design of a music player, it is possible to read all music files　SD card and sent to the DAC DAC and play an audio file through the development board. The design is based on SOPC technology, the use Nios2 soft core processor implementation, including hardware and software design in two parts. The hardware part is mainly responsible for the SD card controller ip core write and debug hardware desired function. Software is mainly responsible for the SD card and a read operation is performed according to the timing information of the audio output of the audio file. Meanwhile, the production of a small music player module, the music played. Final works basically meet the requirements.