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A multi-channel data acquisition system based on GPS timing was designed for long-distance multi-channel synchronized data acquisition. The system combined EP4CE10F17C8,UBLOX-6T,ADS8568 and CYPRESS 68013A to implement 8-channel synchronized and update. The exact time of each sample was obtained with two build-in high precision clock synchronized with GPS timing plus. The FPGA functioned as the core,controlling AD conversion,data organization,caching,and USB transmission. A PC program based on VS2010 was written for data receiving and processing. An experiment shows that the system is stable,features high real-time performance,have a good application value.