diff --git a/src/slic3r/GUI/GUI_Preview.cpp b/src/slic3r/GUI/GUI_Preview.cpp
index 29c636efbb..956d3e65fb 100644
--- a/src/slic3r/GUI/GUI_Preview.cpp
+++ b/src/slic3r/GUI/GUI_Preview.cpp
@@ -477,7 +477,7 @@ void Preview::update_layers_slider_mode()
     // BBS
     if (wxGetApp().filaments_cnt() > 1) {
         //const ModelObjectPtrs& objects = wxGetApp().plater()->model().objects;
-        auto plate_extruders = wxGetApp().plater()->get_partplate_list().get_curr_plate()->get_extruders();
+        auto plate_extruders = wxGetApp().plater()->get_partplate_list().get_curr_plate()->get_extruders_without_support();
         for (auto extruder : plate_extruders) {
             if (extruder != plate_extruders[0])
                 can_change_color = false;
@@ -486,23 +486,23 @@ void Preview::update_layers_slider_mode()
         if (!plate_extruders.empty()) {
             //const int extruder = objects[0]->config.has("extruder") ? objects[0]->config.option("extruder")->getInt() : 0;
             only_extruder = plate_extruders[0];
-        //    auto is_one_extruder_printed_model = [objects, extruder]() {
-        //        for (ModelObject *object : objects) {
-        //            if (object->config.has("extruder") && object->config.option("extruder")->getInt() != extruder) /*return false*/;
+            //    auto is_one_extruder_printed_model = [objects, extruder]() {
+            //        for (ModelObject *object : objects) {
+            //            if (object->config.has("extruder") && object->config.option("extruder")->getInt() != extruder) /*return false*/;
 
-        //            for (ModelVolume *volume : object->volumes)
-        //                if ((volume->config.has("extruder") && volume->config.option("extruder")->getInt() != extruder) || !volume->mmu_segmentation_facets.empty()) return false;
+            //            for (ModelVolume *volume : object->volumes)
+            //                if ((volume->config.has("extruder") && volume->config.option("extruder")->getInt() != extruder) || !volume->mmu_segmentation_facets.empty()) return false;
 
-        //            for (const auto &range : object->layer_config_ranges)
-        //                if (range.second.has("extruder") && range.second.option("extruder")->getInt() != extruder) return false;
-        //        }
-        //        return true;
-        //    };
+            //            for (const auto &range : object->layer_config_ranges)
+            //                if (range.second.has("extruder") && range.second.option("extruder")->getInt() != extruder) return false;
+            //        }
+            //        return true;
+            //    };
 
-        //    if (is_one_extruder_printed_model())
-        //        only_extruder = extruder;
-        //    else
-        //        one_extruder_printed_model = false;
+            //    if (is_one_extruder_printed_model())
+            //        only_extruder = extruder;
+            //    else
+            //        one_extruder_printed_model = false;
         }
     }
 
diff --git a/src/slic3r/GUI/PartPlate.cpp b/src/slic3r/GUI/PartPlate.cpp
index 52b86918ae..2f9014ed9c 100644
--- a/src/slic3r/GUI/PartPlate.cpp
+++ b/src/slic3r/GUI/PartPlate.cpp
@@ -1335,6 +1335,51 @@ std::vector<int> PartPlate::get_extruders(bool conside_custom_gcode) const
 	return plate_extruders;
 }
 
+std::vector<int> PartPlate::get_extruders_without_support(bool conside_custom_gcode) const
+{
+	std::vector<int> plate_extruders;
+	// if gcode.3mf file
+	if (m_model->objects.empty()) {
+		for (int i = 0; i < slice_filaments_info.size(); i++) {
+			plate_extruders.push_back(slice_filaments_info[i].id + 1);
+		}
+		return plate_extruders;
+	}
+
+	// if 3mf file
+	const DynamicPrintConfig& glb_config = wxGetApp().preset_bundle->prints.get_edited_preset().config;
+
+	for (int obj_idx = 0; obj_idx < m_model->objects.size(); obj_idx++) {
+		if (!contain_instance_totally(obj_idx, 0))
+			continue;
+
+		ModelObject* mo = m_model->objects[obj_idx];
+		for (ModelVolume* mv : mo->volumes) {
+			std::vector<int> volume_extruders = mv->get_extruders();
+			plate_extruders.insert(plate_extruders.end(), volume_extruders.begin(), volume_extruders.end());
+		}
+	}
+
+	if (conside_custom_gcode) {
+		//BBS
+		int nums_extruders = 0;
+		if (const ConfigOptionStrings* color_option = dynamic_cast<const ConfigOptionStrings*>(wxGetApp().preset_bundle->project_config.option("filament_colour"))) {
+			nums_extruders = color_option->values.size();
+			if (m_model->plates_custom_gcodes.find(m_plate_index) != m_model->plates_custom_gcodes.end()) {
+				for (auto item : m_model->plates_custom_gcodes.at(m_plate_index).gcodes) {
+					if (item.type == CustomGCode::Type::ToolChange && item.extruder <= nums_extruders)
+						plate_extruders.push_back(item.extruder);
+				}
+			}
+		}
+	}
+
+	std::sort(plate_extruders.begin(), plate_extruders.end());
+	auto it_end = std::unique(plate_extruders.begin(), plate_extruders.end());
+	plate_extruders.resize(std::distance(plate_extruders.begin(), it_end));
+	return plate_extruders;
+}
+
 std::vector<int> PartPlate::get_used_extruders()
 {
 	std::vector<int> used_extruders;
diff --git a/src/slic3r/GUI/PartPlate.hpp b/src/slic3r/GUI/PartPlate.hpp
index 46de2b62e9..9ca59de713 100644
--- a/src/slic3r/GUI/PartPlate.hpp
+++ b/src/slic3r/GUI/PartPlate.hpp
@@ -285,6 +285,7 @@ public:
     Vec3d get_origin() { return m_origin; }
     Vec3d estimate_wipe_tower_size(const double w, const double wipe_volume) const;
     std::vector<int> get_extruders(bool conside_custom_gcode = false) const;
+    std::vector<int> get_extruders_without_support(bool conside_custom_gcode = false) const;
     std::vector<int> get_used_extruders();
 
     /* instance related operations*/