本文首先分析了目前常用的硬盘数据加密方法，并在比较各种加密方案的基础上给出了基于FPGA的加解密SATA IP设计方案。本文介绍设计SATA IP相关的基础知识，包括SATA的体系结构。本sata IP已在Xilinx spartan-6系列上实现并产品化，具有低成本优势，且可以根据用户意愿更换加密算法和使用私有的加密算法。本文还论述了加密SATA IP的各种应用前景。-This paper firstly analyzes several common ways of Hard Disk data protection,　and then presents the design scheme of Encryption/Decryption SATA IP based on FPGA after comparison. Because of the common use of SATA2.0 interface, this paper then introduces the system structure of SATA2.0 protocol. The sata IP has been achieved and the products on the Xilinx spartan-6 series, they has low cost advantage. This article also discusses the outlook for a variety of applications to encrypt SATA IP s.