diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 98377dbc4d..0b3ec8a643 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -3689,7 +3689,7 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
     }
 
     // calculate extrusion length per distance unit
-    double e_per_mm = m_writer.extruder()->e_per_mm3() * path.mm3_per_mm;
+    double e_per_mm = m_writer.extruder()->e_per_mm3() * path.mm3_per_mm * this->config().print_flow_ratio.get_abs_value(1);
 
     double min_speed = double(m_config.slow_down_min_speed.get_at(m_writer.extruder()->id()));
     // set speed
diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index 243f6326fa..63e7ffe027 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -748,9 +748,12 @@ static std::vector<std::string> s_Preset_print_options {
      "timelapse_type", "internal_bridge_support_thickness",
      "wall_generator", "wall_transition_length", "wall_transition_filter_deviation", "wall_transition_angle",
      "wall_distribution_count", "min_feature_size", "min_bead_width",
+     // SoftFever
      "small_perimeter_speed", "small_perimeter_threshold","bridge_angle", "filter_out_gap_fill", "travel_acceleration","inner_wall_acceleration",
      "default_jerk", "outer_wall_jerk", "inner_wall_jerk", "top_surface_jerk", "initial_layer_jerk","travel_jerk",
-     "top_solid_infill_flow_ratio","bottom_solid_infill_flow_ratio","only_one_wall_first_layer"
+     "top_solid_infill_flow_ratio","bottom_solid_infill_flow_ratio","only_one_wall_first_layer",
+     "print_flow_ratio"
+
 };
 
 static std::vector<std::string> s_Preset_filament_options {
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index af38e58f79..d8b77893d9 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -1149,6 +1149,17 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionFloats { 1. });
 
+    def = this->add("print_flow_ratio", coPercent);
+    def->label = L("Flow ratio");
+    def->tooltip = L("The material may have volumetric change after switching between molten state and crystalline state. "
+                     "This setting changes all extrusion flow of this filament in gcode proportionally. "
+                     "Recommended value range is between 0.95 and 1.05. "
+                     "Maybe you can tune this value to get nice flat surface when there has slight overflow or underflow");
+    def->sidetext = L("%");
+    def->mode = comAdvanced;
+    def->min = 2;
+    def->set_default_value(new ConfigOptionPercent(100));
+
     def = this->add("enable_pressure_advance", coBools);
     def->label = L("Enable pressure advance");
     def->tooltip = L("Enable pressure advance, auto calibration result will be overwriten once enabled.");
diff --git a/src/libslic3r/PrintConfig.hpp b/src/libslic3r/PrintConfig.hpp
index 82a1964693..dfc4d15f4d 100644
--- a/src/libslic3r/PrintConfig.hpp
+++ b/src/libslic3r/PrintConfig.hpp
@@ -742,6 +742,8 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionFloat,                overhang_4_4_speed))
     ((ConfigOptionBool,                 only_one_wall_top))
     ((ConfigOptionBool,                 only_one_wall_first_layer))
+    //SoftFever
+    ((ConfigOptionPercent,              print_flow_ratio))
 )
 
 PRINT_CONFIG_CLASS_DEFINE(
diff --git a/src/slic3r/GUI/ParamsPanel.cpp b/src/slic3r/GUI/ParamsPanel.cpp
index caf4d01dc0..7a6588719a 100644
--- a/src/slic3r/GUI/ParamsPanel.cpp
+++ b/src/slic3r/GUI/ParamsPanel.cpp
@@ -598,6 +598,14 @@ void ParamsPanel::set_active_tab(wxPanel* tab)
         wxString title = cur_tab->type() == Preset::TYPE_FILAMENT ? _L("Filament settings") : _L("Printer settings");
         dialog->SetTitle(title);
     }
+    if (cur_tab == m_tab_print) {
+        if (cur_tab)
+            cur_tab->toggle_line("print_flow_ratio", false);
+    }
+    else {
+        if (cur_tab)
+            cur_tab->toggle_line("print_flow_ratio", false);
+    }
 }
 
 bool ParamsPanel::is_active_and_shown_tab(wxPanel* tab)
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 59457a6c08..966ac31ff1 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -1801,6 +1801,7 @@ void TabPrint::build()
 
         optgroup = page->new_optgroup(L("Advanced"), L"param_advanced");
         optgroup->append_single_option_line("wall_infill_order");
+        optgroup->append_single_option_line("print_flow_ratio");
         optgroup->append_single_option_line("bridge_flow");
         optgroup->append_single_option_line("top_solid_infill_flow_ratio");
         optgroup->append_single_option_line("bottom_solid_infill_flow_ratio");