介绍了SDRAM的特点和工作原理，提出了一种基于FPGA的SDRAM控制器的设计方法，使用该方法实现的控制器可非常方便地对SDRAM进行控制。-Describes the characteristics and working principle of SDRAM, we propose a FPGA-based SDRAM controller design method, using the method of the controller can easily control the SDRAM.