diff --git a/eqpalg/algs/exp_bound.cpp b/eqpalg/algs/exp_bound.cpp
index 46c5000..00d2cf2 100644
--- a/eqpalg/algs/exp_bound.cpp
+++ b/eqpalg/algs/exp_bound.cpp
@@ -52,13 +52,13 @@ ExpBound::~ExpBound() {
 
 AlarmInfo ExpBound::mon_proc() {
 
-  if ((bool)exp_feedback_->evaluate() == false) {
+  if (expr_engine_->evaluateBool("feedback") == false) {
     logger_->Debug() << "前提条件不满足！" << std::endl;
     return AlarmInfo{};
   }
 
   /*最新数据*/
-  double now_value = exp_act_->evaluate();
+  double now_value = expr_engine_->evaluate("act");
 
   rule_stat_.current_value = now_value;
   /*报警检查*/
diff --git a/eqpalg/algs/exp_sample2D.cc b/eqpalg/algs/exp_sample2D.cc
index 921c148..218cd12 100644
--- a/eqpalg/algs/exp_sample2D.cc
+++ b/eqpalg/algs/exp_sample2D.cc
@@ -48,7 +48,7 @@ AlarmInfo ExpSample2D::mon_proc() {
   } else {
     switch (exp_type_) {
     case ExpType::PolyFit:
-      if (exp_act_->evaluate() && check_polyFit()) {
+      if (expr_engine_->evaluateBool("act") && check_polyFit()) {
         this->rule_stat_.alarm_value = this->rule_stat_.current_value;
         auto msg = rule_name_ + this->error_str_ + " Y表达式当前值：" +
                    DAA::double2str(this->rule_stat_.current_value) +
@@ -95,38 +95,26 @@ AlarmInfo ExpSample2D::mon_proc() {
 
 int ExpSample2D::reload_samples() {
   /*
-    sample_X绑定 exp_feedback_
-    sample_Y绑定 exp_result_
+    sample_X绑定 expr_engine_->evaluate("sample_X")
+    sample_Y绑定 expr_engine_->evaluate("sample_Y")
   */
   auto tmp_exp =
       rule_json_.at("function").at("sample_X").at("value").get<std::string>();
   exp_str_ = get_macro_replaced_exp(tmp_exp);
-  if (exp_feedback_ == nullptr && exp_str_ != "") {
-    try {
-      exp_feedback_ =
-          std::make_unique<mix_cc::matheval::Expression>(exp_str_, &mm_vars);
-      logger_->Debug() << "sample_X:" << exp_str_ << "="
-                       << exp_feedback_->evaluate() << endl;
-    } catch (const std::exception &e) {
-      logger_->Error() << "sample_X:" << exp_str_ << "计算出错：" << e.what()
-                       << ",location:" << BOOST_CURRENT_LOCATION << endl;
-      return -1;
-    }
+  if (exp_str_ != "") {
+    int ret = expr_engine_->registerExpression("sample_X", exp_str_);
+    if (ret != 0) return -1;
+    logger_->Debug() << "sample_X:" << exp_str_ << "="
+                     << expr_engine_->evaluate("sample_X") << endl;
   }
   tmp_exp =
       rule_json_.at("function").at("sample_Y").at("value").get<std::string>();
   exp_str_ = get_macro_replaced_exp(tmp_exp);
-  if (exp_result_ == nullptr && exp_str_ != "") {
-    try {
-      exp_result_ =
-          std::make_unique<mix_cc::matheval::Expression>(exp_str_, &mm_vars);
-      logger_->Debug() << "sample_Y:" << exp_str_ << "="
-                       << exp_result_->evaluate() << endl;
-    } catch (const std::exception &e) {
-      logger_->Error() << "sample_Y:" << exp_str_ << "计算出错：" << e.what()
-                       << ",location:" << BOOST_CURRENT_LOCATION << endl;
-      return -1;
-    }
+  if (exp_str_ != "") {
+    int ret = expr_engine_->registerExpression("sample_Y", exp_str_);
+    if (ret != 0) return -1;
+    logger_->Debug() << "sample_Y:" << exp_str_ << "="
+                     << expr_engine_->evaluate("sample_Y") << endl;
   }
 
   tmp_exp = rule_json_.at("function")
@@ -173,8 +161,8 @@ int ExpSample2D::reload_samples() {
 }
 
 bool ExpSample2D::check_polyFit() {
-  double X = exp_feedback_->evaluate(); /* SampleX*/
-  double Y = exp_result_->evaluate();   /* SampleY*/
+  double X = expr_engine_->evaluate("sample_X"); /* SampleX*/
+  double Y = expr_engine_->evaluate("sample_Y"); /* SampleY*/
   double Y_Fit = PolyFitValue(X, this->fit_coefs_, this->orders_);
   limit_down_ = Y_Fit - abs(Y_Fit) * scale_;
   limit_up_ = Y_Fit + abs(Y_Fit) * scale_;
@@ -207,9 +195,9 @@ double ExpSample2D::PolyFitValue(double x, std::vector<double> &fit_coefs,
 
 bool ExpSample2D::check_pear() {
   if (this->data_len_ < min_len_) {
-    if (exp_act_->evaluate()) {
-      SampleX_.push_back(exp_feedback_->evaluate());
-      SampleY_.push_back(exp_result_->evaluate());
+    if (expr_engine_->evaluateBool("act")) {
+      SampleX_.push_back(expr_engine_->evaluate("sample_X"));
+      SampleY_.push_back(expr_engine_->evaluate("sample_Y"));
       data_len_ = SampleX_.size();
     } else {
       reset_SampleXY();
@@ -431,9 +419,9 @@ void ExpSample2D::task_mon_pro() {
   for (auto i = 0; i < queried_data_.rows(); i++) {
     refresh_exp_vars_ihd(i);
     if (data_len_ < MAX_STORAGE_SIZE) {
-      if (exp_act_->evaluate()) {
-        SampleX_.push_back(exp_feedback_->evaluate());
-        SampleY_.push_back(exp_result_->evaluate());
+      if (expr_engine_->evaluateBool("act")) {
+        SampleX_.push_back(expr_engine_->evaluate("sample_X"));
+        SampleY_.push_back(expr_engine_->evaluate("sample_Y"));
         data_len_ = SampleX_.size();
       }
     } else {
diff --git a/eqpalg/algs/exp_times.cc b/eqpalg/algs/exp_times.cc
index a94025f..064f8ae 100644
--- a/eqpalg/algs/exp_times.cc
+++ b/eqpalg/algs/exp_times.cc
@@ -198,7 +198,7 @@ int ExpTimes::update_times() {
     return -1;
   }
 
-  this->act_triggered_ = this->exp_act_->evaluate();
+  this->act_triggered_ = expr_engine_->evaluateBool("act");
   /*出现次数累计*/
   if (this->exp_type_ == ExpType::OccTimesAcc) {
     if (this->act_triggered_) {