diff --git a/CMakeLists.txt b/CMakeLists.txt
index 65ed0a9..057169b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,9 +3,9 @@ project(BetterSTL VERSION 0.1.0 LANGUAGES C CXX)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 # 定义源文件
-set(BETTERSTL_SOURCES 
-    src/BigInteger.cpp
-    src/BigDecimal.cpp)
+set(BETTERSTL_SOURCES
+        src/big_integer.cpp
+        src/big_decimal.cpp)
 
 # 生成静态库 (.a 文件)
 add_library(BetterSTL_static STATIC ${BETTERSTL_SOURCES})
@@ -26,12 +26,12 @@ add_library(BetterSTL ALIAS BetterSTL_static)
 
 enable_testing()
 
-add_executable(BigIntegerTests tests/BigIntegerTest.cpp)
+add_executable(BigIntegerTests tests/big_integer_test.cpp)
 target_include_directories(BigIntegerTests PRIVATE include)
 target_link_libraries(BigIntegerTests PRIVATE BetterSTL_static)
 add_test(NAME BigIntegerTests COMMAND BigIntegerTests)
 
-add_executable(BigDecimalTests tests/BigDecimalTest.cpp)
+add_executable(BigDecimalTests tests/big_decimal_test.cpp)
 target_include_directories(BigDecimalTests PRIVATE include)
 target_link_libraries(BigDecimalTests PRIVATE BetterSTL_static)
 add_test(NAME BigDecimalTests COMMAND BigDecimalTests)
diff --git a/include/bstl.hpp b/include/bstl.hpp
deleted file mode 100644
index 4a94a8b..0000000
--- a/include/bstl.hpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-#include<BigDecimal.hpp>
-#include<BigInteger.hpp>
-#include <bstlint.hpp>
-#ifndef BETTERSTL_BSTL_HPP
-#define BETTERSTL_BSTL_HPP
-#endif //BETTERSTL_BSTL_HPP
diff --git a/include/BigDecimal.hpp b/include/bstl/big_decimal.hpp
similarity index 93%
rename from include/BigDecimal.hpp
rename to include/bstl/big_decimal.hpp
index 322cc73..59b8639 100644
--- a/include/BigDecimal.hpp
+++ b/include/bstl/big_decimal.hpp
@@ -1,11 +1,11 @@
-#pragma once
+#ifndef BETTERSTL_BIG_DECIMAL_H
+#define BETTERSTL_BIG_DECIMAL_H
 
 #include <string>
-#include "BigInteger.hpp"
+#include <bstl/big_integer.hpp>
 
 namespace bstl {
-
-class BigDecimal {
+    class BigDecimal {
 public:
     BigDecimal();
     BigDecimal(int value);
@@ -70,3 +70,5 @@ private:
 };
 
 } // namespace bstl
+
+#endif //BETTERSTL_BIG_DECIMAL_H
diff --git a/include/BigInteger.hpp b/include/bstl/big_integer.hpp
similarity index 95%
rename from include/BigInteger.hpp
rename to include/bstl/big_integer.hpp
index ed6a4a9..c4f12d9 100644
--- a/include/BigInteger.hpp
+++ b/include/bstl/big_integer.hpp
@@ -1,4 +1,5 @@
-#pragma once
+#ifndef BETTERSTL_BIG_INTEGER_HPP
+#define BETTERSTL_BIG_INTEGER_HPP
 
 #include <string>
 
@@ -64,6 +65,6 @@ private:
     static std::string divAbs(const std::string& a, const std::string& b);
 };
 
-using BitInteger = BigInteger;
-
 } // namespace bstl
+
+#endif //BETTERSTL_BIG_INTEGER_HPP
diff --git a/include/bstl/big_number.hpp b/include/bstl/big_number.hpp
new file mode 100644
index 0000000..ddd2e3a
--- /dev/null
+++ b/include/bstl/big_number.hpp
@@ -0,0 +1,7 @@
+#ifndef BETTERSTL_BIG_NUMBERS_HPP
+#define BETTERSTL_BIG_NUMBERS_HPP
+
+#include <bstl/biginteger.hpp>
+#include <bstl/bigdecimal.hpp>
+
+#endif // BETTERSTL_BIG_NUMBERS_HPP
diff --git a/include/bstl/bstl.hpp b/include/bstl/bstl.hpp
new file mode 100644
index 0000000..8ca613f
--- /dev/null
+++ b/include/bstl/bstl.hpp
@@ -0,0 +1,8 @@
+#ifndef BETTERSTL_BSTL_HPP
+
+#include<bstl/big_decimal.hpp>
+#include<bstl/big_integer.hpp>
+#include <bstl/bstlint.hpp>
+
+#define BETTERSTL_BSTL_HPP
+#endif //BETTERSTL_BSTL_HPP
diff --git a/include/bstlint.hpp b/include/bstl/bstlint.hpp
similarity index 100%
rename from include/bstlint.hpp
rename to include/bstl/bstlint.hpp
diff --git a/src/BigDecimal.cpp b/src/big_decimal.cpp
similarity index 99%
rename from src/BigDecimal.cpp
rename to src/big_decimal.cpp
index c4d429c..52291ee 100644
--- a/src/BigDecimal.cpp
+++ b/src/big_decimal.cpp
@@ -1,4 +1,4 @@
-#include "BigDecimal.hpp"
+#include <bstl/big_decimal.hpp>
 
 #include <stdexcept>
 #include <sstream>
@@ -32,7 +32,7 @@ BigDecimal::BigDecimal(const std::string& value) : unscaledValue_(0), scale_(0)
     }
 
     std::string text = value;
-    
+
     // 去掉前后空格
     size_t start = 0, end = text.size();
     while (start < end && text[start] == ' ') start++;
@@ -87,7 +87,7 @@ std::string BigDecimal::toString() const {
     }
 
     std::string digitStr = unscaledValue_.toString();
-    
+
     // 处理符号
     bool negative = false;
     if (digitStr[0] == '-') {
@@ -156,7 +156,7 @@ bool BigDecimal::operator<(const BigDecimal& other) const {
     int lhsScale = scale_;
     int rhsScale = other.scale_;
     alignScale(lhs, lhsScale, rhs, rhsScale);
-    
+
     if (unscaledValue_.sign() >= 0) {
         return lhs < rhs;
     } else {
@@ -297,7 +297,7 @@ BigDecimal BigDecimal::operator/(const BigDecimal& other) const {
     BigInteger rhs = other.unscaledValue_;
     int lhsScale = scale_;
     int rhsScale = other.scale_;
-    
+
     // 使用更高的精度进行除法
     // 乘以 10^precision 来获得更多的精度
     int precision = 10;
diff --git a/src/BigInteger.cpp b/src/big_integer.cpp
similarity index 99%
rename from src/BigInteger.cpp
rename to src/big_integer.cpp
index 8353f30..3ed86c3 100644
--- a/src/BigInteger.cpp
+++ b/src/big_integer.cpp
@@ -1,4 +1,4 @@
-#include "BigInteger.hpp"
+#include <bstl/big_integer.hpp>
 
 #include <algorithm>
 #include <stdexcept>
@@ -69,7 +69,7 @@ std::string BigInteger::mulAbs(const std::string& a, const std::string& b) {
     std::string ta = trimLeadingZeros(a);
     std::string tb = trimLeadingZeros(b);
     if (ta == "0" || tb == "0") return "0";
-    
+
     std::vector<int> product(ta.size() + tb.size(), 0);
     for (size_t i = 0; i < ta.size(); i++) {
         for (size_t j = 0; j < tb.size(); j++) {
@@ -77,14 +77,14 @@ std::string BigInteger::mulAbs(const std::string& a, const std::string& b) {
             product[i + j] += mul;
         }
     }
-    
+
     int carry = 0;
     for (size_t i = 0; i < product.size(); i++) {
         int sum = product[i] + carry;
         product[i] = sum % 10;
         carry = sum / 10;
     }
-    
+
     std::string result;
     for (int i = static_cast<int>(product.size()) - 1; i >= 0; i--) {
         result += char('0' + product[i]);
@@ -101,7 +101,7 @@ std::string BigInteger::divAbs(const std::string& a, const std::string& b) {
     if (compareAbs(ta, tb) < 0) {
         return "0";
     }
-    
+
     std::string quotient;
     std::string current;
     for (char digit : ta) {
@@ -172,29 +172,29 @@ BigInteger::BigInteger(const std::string& value) : digits_("0"), sign_(1) {
         sign_ = 0;
         return;
     }
-    
+
     std::string text = value;
     sign_ = 1;
-    
+
     if (text[0] == '-') {
         sign_ = -1;
         text = text.substr(1);
     } else if (text[0] == '+') {
         text = text.substr(1);
     }
-    
+
     if (text.empty()) {
         digits_ = "0";
         sign_ = 0;
         return;
     }
-    
+
     for (char ch : text) {
         if (ch < '0' || ch > '9') {
             throw std::invalid_argument("BigInteger: invalid numeric string");
         }
     }
-    
+
     digits_ = trimLeadingZeros(text);
     if (digits_ == "0") {
         sign_ = 0;
@@ -327,7 +327,7 @@ BigInteger& BigInteger::operator/=(const BigInteger& other) {
 BigInteger BigInteger::operator+(const BigInteger& other) const {
     if (isZero()) return other;
     if (other.isZero()) return *this;
-    
+
     BigInteger result;
     if (sign_ == other.sign_) {
         result.digits_ = addAbs(digits_, other.digits_);
diff --git a/tests/BigDecimalTest.cpp b/tests/big_decimal_test.cpp
similarity index 95%
rename from tests/BigDecimalTest.cpp
rename to tests/big_decimal_test.cpp
index 8a14df4..d168e21 100644
--- a/tests/BigDecimalTest.cpp
+++ b/tests/big_decimal_test.cpp
@@ -1,4 +1,4 @@
-#include <BigDecimal.hpp>
+#include <bstl/big_decimal.hpp>
 
 #include <cassert>
 #include <iostream>
diff --git a/tests/BigIntegerTest.cpp b/tests/big_integer_test.cpp
similarity index 96%
rename from tests/BigIntegerTest.cpp
rename to tests/big_integer_test.cpp
index 475478b..701a353 100644
--- a/tests/BigIntegerTest.cpp
+++ b/tests/big_integer_test.cpp
@@ -1,4 +1,4 @@
-#include <BigInteger.hpp>
+#include <bstl/big_integer.hpp>
 
 #include <cassert>
 #include <iostream>