diff --git a/equation_solver.py b/equation_solver.py
index d990e5e..99528c6 100644
--- a/equation_solver.py
+++ b/equation_solver.py
@@ -57,18 +57,10 @@ def solve_equation(eq):
     matrix = np.mat(matrix, int)
     # 求解线性方程组
     try:
-        result = np.linalg.solve(matrix, constant).tolist()
-    except np.linalg.LinAlgError:
-        # 将常数项取负，插入到矩阵的最后一列
-        constant = [-x for x in constant]
-        matrix = np.insert(matrix, matrix.shape[1], constant, axis=1)
-        # 再次尝试求解
-        try:
-            constant = np.zeros(matrix.shape[0], int)
-            result = sp.linalg.solve(matrix, constant).tolist()
-        except Exception as e:
-            print('无法配平' + str(e))
-            return None
+        result = sp.optimize.lsq_linear(matrix, constant, bounds=(0, None)).x.tolist()
+    except ValueError:
+        print('无法配平')
+        return None
 
     # 将结果写入化学方程式，最后一个生成物的系数需要计算得到
     last_substance = eq['right'][-1]
@@ -76,7 +68,6 @@ def solve_equation(eq):
     # 计算除最后一种生成物外的所有生成物包含last_atom的系数之和
     sum_ = 0
     index = 0
-    print(result)
     for each in eq['left']:
         for atom in each['atoms']:
             if last_atom in atom:
@@ -118,4 +109,4 @@ def expand_to_int(*args):
     result = []
     for each in fractions:
         result.append(each.numerator * lcm // each.denominator)
-    return result
\ No newline at end of file
+    return result
diff --git a/main.py b/main.py
index 0ce3fae..b92af5a 100644
--- a/main.py
+++ b/main.py
@@ -9,7 +9,7 @@ import equation_solver
 # 按间距中的绿色按钮以运行脚本。
 if __name__ == '__main__':
     while True:
-        eq = input('请输入化学方程式：')
+        eq = input('请输入化学方程式：(输入exit退出)')
         if eq == 'exit':
             break
         try: