diff --git a/README.md b/README.md
index ac739f9..ab06613 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@
 
 **tb**：testbench文件；
 
-**FPGA**：存放FPGA相关文件，如约束文件；
+**fpga**：存放FPGA相关文件，如约束文件；
 
 tinyriscv的整体框架如下：
 
@@ -142,7 +142,7 @@ C语言程序例程位于tests\example目录里。
 
 # 5.移植到FPGA
 
-详细的移植方法请查看本项目下的FPGA目录中的README.md文件。
+详细的移植方法请查看本项目下的fpga目录中的README.md文件。
 
 # 6.未来计划
 
diff --git a/FPGA/README.md b/fpga/README.md
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diff --git a/FPGA/constrs/tinyriscv.xdc b/fpga/constrs/tinyriscv.xdc
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rename from FPGA/constrs/tinyriscv.xdc
rename to fpga/constrs/tinyriscv.xdc
diff --git a/FPGA/images/add_sim.png b/fpga/images/add_sim.png
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rename to fpga/images/add_sim.png
diff --git a/FPGA/images/add_src_1.png b/fpga/images/add_src_1.png
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diff --git a/FPGA/images/create_prj_1.png b/fpga/images/create_prj_1.png
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