High-speed real-time digital collection of digital nuclear spectrometer plays a key role in debug-ging key algorithms.This work used ALTERA′s field programmable gate array -EP2C8T144C6 and high-speed USB data acquisition chip-FT2232H as the core, designed a USB high-speed data acquisition card, which can complete the function of high speed data transmission through USB port.The data collected from nu-clear detector transfer to the FPGA, then cached in FIFO of FPGA, and do some simple calculations and filte-ring.Finally the data are sent to computers through the USB controller, displaying and saving in the computer. This work realized the function of more than 28 MByte/s data transmission, having the characteristics of high-speed and high-accuracy, laying a foundation for further implementation of high speed signal collection of dig-ital nuclear spectrometer.%数字核谱仪的高速实时数据采集能够对数字核谱仪中关键算法的调试起到关键作用。本设计以ALTERA公司的EP2C8T144C6现场可编程门阵列与高速USB数据采集芯片FT2232H为核心，设计并制作了USB高速数据采集系统，可以实现USB接口高速数据传输。核谱仪采集到的信号送入到FPGA中，经过内部FIFO存储器的缓存及算法处理，最后通过USB控制器将信号传输到计算机中，存储并显示出来。设计实现了28MByte／s以上的数据传输率，具有数据传输速度快，准确性高的特点，为进一步实现数字核谱仪高速信号采集奠定了基础。
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