diff --git a/src/Function1D.cpp b/src/Function1D.cpp
index cc9c3c4..709968f 100644
--- a/src/Function1D.cpp
+++ b/src/Function1D.cpp
@@ -328,9 +328,9 @@ Matrix Aurora::log(const Matrix& aMatrix, int aBaseNum)
     {
         double baseNum = aBaseNum;
         double temp;
+        vdLn(1, &baseNum, &temp);
         for (size_t i = 0; i < size; i++)
         {
-            vdLn(1, &baseNum, &temp);
             data[i] /= temp;
         }
     }
@@ -371,3 +371,17 @@ Matrix Aurora::mod(const Matrix& aMatrix, double aValue)
 
     return Matrix::New(resultData, aMatrix);
 }
+
+Matrix Aurora::acos(const Matrix& aMatrix)
+{
+    if(aMatrix.isComplex() || aMatrix.isNull())
+    {
+        return Matrix();
+    }
+
+    size_t size = aMatrix.getDataSize();
+    double* matrixData = aMatrix.getData();
+    double* resultData = Aurora::malloc(size);
+    vdAcos(size, matrixData, resultData);
+    return Matrix::New(resultData, aMatrix);
+}
diff --git a/src/Function1D.h b/src/Function1D.h
index 1b8e54f..456b5cf 100644
--- a/src/Function1D.h
+++ b/src/Function1D.h
@@ -53,6 +53,8 @@ namespace Aurora {
 
     Matrix mod(const Matrix& aMatrix, double aValue);
 
+    Matrix acos(const Matrix& aMatrix);
+
     /**
      * 多项式计算
      * @brief 例如p[1 0 1],x[3 2 5],代表对多项式 y = x^2 + 1 求(x=3, x=2, x=5)时所有的y
diff --git a/test/Function1D_Test.cpp b/test/Function1D_Test.cpp
index 4c37543..ecf70ec 100644
--- a/test/Function1D_Test.cpp
+++ b/test/Function1D_Test.cpp
@@ -246,3 +246,12 @@ TEST_F(Function1D_Test, mod) {
     EXPECT_DOUBLE_AE(result.getData()[1],0.83);
     EXPECT_DOUBLE_AE(result.getData()[2],0.4);
 }
+
+TEST_F(Function1D_Test, acos) {
+    double *data = new double[3]{0.02,0.83,0.4,};
+    auto matrix = Aurora::Matrix::fromRawData(data, 3);
+    auto result = Aurora::acos(matrix);
+    EXPECT_DOUBLE_AE(result.getData()[0],1.5508);
+    EXPECT_DOUBLE_AE(result.getData()[1],0.5917);
+    EXPECT_DOUBLE_AE(result.getData()[2],1.1593);
+}