diff --git a/src/MeoAsstGui/Helper/AsstProxy.cs b/src/MeoAsstGui/Helper/AsstProxy.cs
index 1cd9d1e793..f4a585aeaa 100644
--- a/src/MeoAsstGui/Helper/AsstProxy.cs
+++ b/src/MeoAsstGui/Helper/AsstProxy.cs
@@ -1062,7 +1062,7 @@ namespace MeoAsstGui
             task_params["stone"] = max_stone;
             task_params["times"] = max_times;
             task_params["report_to_penguin"] = true;
-            if (drops_item_quantity != 0)
+            if (drops_item_quantity != 0 && !string.IsNullOrWhiteSpace(drops_item_id))
             {
                 task_params["drops"] = new JObject();
                 task_params["drops"][drops_item_id] = drops_item_quantity;
diff --git a/src/MeoAsstGui/Helper/CombData.cs b/src/MeoAsstGui/Helper/CombData.cs
index 563b10606e..d06aed8d97 100644
--- a/src/MeoAsstGui/Helper/CombData.cs
+++ b/src/MeoAsstGui/Helper/CombData.cs
@@ -18,5 +18,7 @@ namespace MeoAsstGui
     /// </summary>
     public class CombData : GenericCombData<string>
     {
+        /// <inheritdoc/>
+        public override string ToString() => Display;
     }
 }
diff --git a/src/MeoAsstGui/Helper/ComboBoxExtensions.cs b/src/MeoAsstGui/Helper/ComboBoxExtensions.cs
new file mode 100644
index 0000000000..28c94583b6
--- /dev/null
+++ b/src/MeoAsstGui/Helper/ComboBoxExtensions.cs
@@ -0,0 +1,111 @@
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace MeoAsstGui.Helper
+{
+    /// <summary>
+    /// <seealso cref="ComboBox"/> Extensions
+    /// </summary>
+    public static class ComboBoxExtensions
+    {
+        private const string InputTag = "TextInput";
+        private const string SelectionTag = "Selection";
+
+        /// <summary>
+        /// Make <seealso cref="ComboBox"/> searchable
+        /// </summary>
+        /// <param name="targetComboBox">Target <seealso cref="ComboBox"/></param>
+        public static void MakeComboBoxSearchable(this ComboBox targetComboBox)
+        {
+            var targetTextBox = targetComboBox?.Template.FindName("PART_EditableTextBox", targetComboBox) as TextBox;
+            if (targetTextBox == null)
+            {
+                return;
+            }
+
+            targetComboBox.Items.IsLiveFiltering = true;
+            targetComboBox.StaysOpenOnEdit = true;
+            targetComboBox.IsEditable = true;
+            targetComboBox.IsTextSearchEnabled = false;
+
+            // enter input mode by default
+            targetComboBox.Tag = InputTag;
+
+            targetTextBox.PreviewKeyDown += (se, ev) =>
+            {
+                if (ev.Key == Key.Enter || ev.Key == Key.Return || ev.Key == Key.Tab)
+                {
+                    return;
+                }
+
+                // switch to input mode
+                targetComboBox.Tag = InputTag;
+
+                // reset selection
+                if (targetComboBox.SelectedItem != null)
+                {
+                    targetComboBox.SelectedItem = null;
+                    targetComboBox.Text = string.Empty;
+                }
+            };
+
+            targetTextBox.TextChanged += (o, args) =>
+            {
+                if (targetComboBox.Tag is SelectionTag)
+                {
+                    // text changed in selection mode, switch to input mode
+                    targetComboBox.Tag = InputTag;
+                }
+                else
+                {
+                    // input mode
+                    var searchTerm = targetTextBox.Text;
+
+                    // reset selection
+                    if (targetComboBox.SelectionBoxItem != null)
+                    {
+                        targetComboBox.SelectedItem = null;
+                        targetTextBox.Text = searchTerm;
+                        targetTextBox.SelectionStart = targetTextBox.Text.Length;
+                    }
+
+                    // filter items
+                    if (string.IsNullOrEmpty(searchTerm))
+                    {
+                        targetComboBox.Items.Filter = item => true;
+                        targetComboBox.SelectedItem = default;
+                    }
+                    else
+                    {
+                        targetComboBox.Items.Filter = item => item.ToString().Contains(searchTerm);
+                    }
+
+                    targetTextBox.SelectionStart = targetTextBox.Text.Length;
+                }
+
+                targetComboBox.IsDropDownOpen = true;
+            };
+
+            targetComboBox.SelectionChanged += (o, args) =>
+            {
+                // selection changed, switch to selection mode
+                if (targetComboBox.SelectedItem != null)
+                {
+                    targetComboBox.Tag = SelectionTag;
+                }
+            };
+
+            targetComboBox.LostFocus += (o, args) =>
+            {
+                // reset text to the corresponding display text of selected item
+                var text = targetComboBox.SelectedItem?.ToString();
+                if (targetComboBox.Text != text)
+                {
+                    targetComboBox.Tag = SelectionTag;
+                    targetComboBox.Text = text;
+                    targetComboBox.Items.Filter = item => true;
+                }
+            };
+        }
+    }
+}
diff --git a/src/MeoAsstGui/MeoAsstGui.csproj b/src/MeoAsstGui/MeoAsstGui.csproj
index 7590066a14..8652c23353 100644
--- a/src/MeoAsstGui/MeoAsstGui.csproj
+++ b/src/MeoAsstGui/MeoAsstGui.csproj
@@ -108,6 +108,7 @@
     <Compile Include="Helper\AsstProxy.cs" />
     <Compile Include="Helper\AutoScroll.cs" />
     <Compile Include="Helper\CombData.cs" />
+    <Compile Include="Helper\ComboBoxExtensions.cs" />
     <Compile Include="Helper\GenericCombData{TValueType}.cs" />
     <Compile Include="Helper\Localization.cs" />
     <Compile Include="Helper\LogColor.cs" />
diff --git a/src/MeoAsstGui/UserControl/FightSettingsUserControl.xaml b/src/MeoAsstGui/UserControl/FightSettingsUserControl.xaml
index 74522e6298..af14224fbd 100644
--- a/src/MeoAsstGui/UserControl/FightSettingsUserControl.xaml
+++ b/src/MeoAsstGui/UserControl/FightSettingsUserControl.xaml
@@ -110,7 +110,8 @@
                         DisplayMemberPath="Display"
                         IsDropDownOpen="{Binding IsDropDown}"
                         IsEditable="True"
-                        IsTextSearchEnabled="True"
+                        IsTextSearchEnabled="False"
+                        Loaded="{s:Action DropsList_Loaded}"
                         ItemsSource="{Binding DropsList}"
                         SelectedValue="{Binding DropsItemId}"
                         SelectedValuePath="Value"
diff --git a/src/MeoAsstGui/ViewModels/TaskQueueViewModel.cs b/src/MeoAsstGui/ViewModels/TaskQueueViewModel.cs
index 5dbd2ba288..87857df4bd 100644
--- a/src/MeoAsstGui/ViewModels/TaskQueueViewModel.cs
+++ b/src/MeoAsstGui/ViewModels/TaskQueueViewModel.cs
@@ -22,6 +22,8 @@ using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Controls;
+using MeoAsstGui.Helper;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using Stylet;
@@ -1487,6 +1489,8 @@ namespace MeoAsstGui
             }
         }
 
+        #region Drops
+
         private bool _isSpecifiedDrops = Convert.ToBoolean(ViewStatusStorage.Get("MainFunction.Drops.Enable", bool.FalseString));
 
         /// <summary>
@@ -1552,7 +1556,7 @@ namespace MeoAsstGui
         /// </summary>
         public ObservableCollection<CombData> DropsList { get; set; }
 
-        private string _dropsItemId = ViewStatusStorage.Get("MainFunction.Drops.ItemId", "0");
+        private string _dropsItemId = ViewStatusStorage.Get("MainFunction.Drops.ItemId", string.Empty);
 
         /// <summary>
         /// Gets or sets the item ID of drops.
@@ -1562,11 +1566,6 @@ namespace MeoAsstGui
             get => _dropsItemId;
             set
             {
-                if (value == null)
-                {
-                    return;
-                }
-
                 SetAndNotify(ref _dropsItemId, value);
                 ViewStatusStorage.Set("MainFunction.Drops.ItemId", DropsItemId);
             }
@@ -1599,15 +1598,6 @@ namespace MeoAsstGui
                 }
 
                 _preSetDropsItemTicks = DateTime.Now.Ticks;
-                DropsList.Clear();
-                foreach (CombData drop in AllDrops)
-                {
-                    var enumStr = drop.Display;
-                    if (enumStr.Contains(value))
-                    {
-                        DropsList.Add(drop);
-                    }
-                }
 
                 SetAndNotify(ref _dropsItem, value);
             }
@@ -1638,5 +1628,17 @@ namespace MeoAsstGui
                 ViewStatusStorage.Set("MainFunction.Drops.Quantity", DropsQuantity);
             }
         }
+
+        /// <summary>
+        /// DropsList ComboBox loaded
+        /// </summary>
+        /// <param name="sender">Event sender</param>
+        /// <param name="e">Event args</param>
+        public void DropsList_Loaded(object sender, EventArgs e)
+        {
+            (sender as ComboBox)?.MakeComboBoxSearchable();
+        }
+
+        #endregion Drops
     }
 }