diff --git a/app/src/main/java/net/imshit/aircraftwar/gui/ManageSpaceActivity.kt b/app/src/main/java/net/imshit/aircraftwar/gui/ManageSpaceActivity.kt
index 4424aa7..9e5a851 100644
--- a/app/src/main/java/net/imshit/aircraftwar/gui/ManageSpaceActivity.kt
+++ b/app/src/main/java/net/imshit/aircraftwar/gui/ManageSpaceActivity.kt
@@ -31,7 +31,7 @@ class ManageSpaceActivity : AppCompatActivity() {
                     Difficulty.EASY, Difficulty.MEDIUM, Difficulty.HARD
                 ).forEach { gameMode ->
                     ScoreboardDaoSharedPreferences(this@ManageSpaceActivity, gameMode).apply {
-                        deleteAll()
+                        clear()
                         close()
                     }
                 }
diff --git a/app/src/main/java/net/imshit/aircraftwar/gui/ScoreboardActivity.kt b/app/src/main/java/net/imshit/aircraftwar/gui/ScoreboardActivity.kt
index 8736bcf..3661492 100644
--- a/app/src/main/java/net/imshit/aircraftwar/gui/ScoreboardActivity.kt
+++ b/app/src/main/java/net/imshit/aircraftwar/gui/ScoreboardActivity.kt
@@ -7,14 +7,15 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.TextView
+import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import androidx.cardview.widget.CardView
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import net.imshit.aircraftwar.R
 import net.imshit.aircraftwar.databinding.ActivityScoreboardBinding
 import net.imshit.aircraftwar.logic.data.Difficulty
 import net.imshit.aircraftwar.util.dao.ScoreInfo
-import net.imshit.aircraftwar.util.dao.ScoreboardDao
 import net.imshit.aircraftwar.util.dao.ScoreboardDaoSharedPreferences
 
 class ScoreboardActivity : AppCompatActivity() {
@@ -26,23 +27,31 @@ class ScoreboardActivity : AppCompatActivity() {
             })
         }
 
-        class ScoreInfoAdapter(val scoreInfoList: List<ScoreInfo>) :
+        class ScoreInfoAdapter(val scoreInfoList: MutableList<ScoreInfo>) :
             RecyclerView.Adapter<ScoreInfoAdapter.ScoreInfoViewHolder>() {
             class ScoreInfoViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
-                private val scoreInfoNameView: TextView = itemView.findViewById(R.id.sbvi_name)
-                private val scoreInfoScoreView: TextView = itemView.findViewById(R.id.sbvi_score)
-                private val scoreInfoTimeView: TextView = itemView.findViewById(R.id.sbvi_time)
+                val view: CardView = itemView.findViewById(R.id.sbvi_card)
+                private val nameView: TextView = itemView.findViewById(R.id.sbvi_name)
+                private val scoreView: TextView = itemView.findViewById(R.id.sbvi_score)
+                private val timeView: TextView = itemView.findViewById(R.id.sbvi_time)
                 fun bind(scoreInfo: ScoreInfo) {
-                    scoreInfoNameView.text = scoreInfo.name
-                    scoreInfoScoreView.text = scoreInfo.score.toString()
-                    scoreInfoTimeView.text = scoreInfo.time
+                    this.nameView.text = scoreInfo.name
+                    this.scoreView.text = scoreInfo.score.toString()
+                    this.timeView.text = scoreInfo.time
                 }
             }
 
             override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ScoreInfoViewHolder {
                 val view = LayoutInflater.from(parent.context)
                     .inflate(R.layout.scoreboard_view_item, parent, false)
-                return ScoreInfoViewHolder(view)
+                val scoreInfoViewHolder = ScoreInfoViewHolder(view)
+                scoreInfoViewHolder.view.setOnLongClickListener {
+                    val position = scoreInfoViewHolder.adapterPosition
+                    scoreInfoList.removeAt(position)
+                    notifyItemRemoved(position)
+                    false
+                }
+                return scoreInfoViewHolder
             }
 
             override fun getItemCount(): Int = scoreInfoList.size
@@ -53,7 +62,7 @@ class ScoreboardActivity : AppCompatActivity() {
         }
     }
 
-    private lateinit var dao: ScoreboardDao
+    private lateinit var dao: ScoreboardDaoSharedPreferences
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -78,11 +87,14 @@ class ScoreboardActivity : AppCompatActivity() {
                         R.string.item_about_long
                     ).setIcon(R.drawable.ic_about_24).setMessage(R.string.app_about)
                         .setPositiveButton(android.R.string.ok) { _, _ -> }.show()
+
+                    R.id.item_delete -> Toast.makeText(
+                        this@ScoreboardActivity, "长按删除", Toast.LENGTH_SHORT
+                    ).show()// TODO
                 }
                 return@setOnMenuItemClickListener true
             }
-
-            asRv.adapter = ScoreInfoAdapter(dao.getTopK())
+            asRv.adapter = ScoreInfoAdapter(dao.buffer)
         }
     }
 
diff --git a/app/src/main/java/net/imshit/aircraftwar/util/dao/ScoreboardDao.kt b/app/src/main/java/net/imshit/aircraftwar/util/dao/ScoreboardDao.kt
index c69ae0f..4b8db29 100644
--- a/app/src/main/java/net/imshit/aircraftwar/util/dao/ScoreboardDao.kt
+++ b/app/src/main/java/net/imshit/aircraftwar/util/dao/ScoreboardDao.kt
@@ -32,7 +32,7 @@ sealed interface ScoreboardDao : Closeable {
      */
     fun deleteItem(indices: IntArray)
 
-    fun deleteAll()
+    fun clear()
 
     /**
      * 关闭计分板数据模型（通常来说意味着缓存写回）
diff --git a/app/src/main/java/net/imshit/aircraftwar/util/dao/ScoreboardDaoSharedPreferences.kt b/app/src/main/java/net/imshit/aircraftwar/util/dao/ScoreboardDaoSharedPreferences.kt
index 0dccc8e..9e6d4a7 100644
--- a/app/src/main/java/net/imshit/aircraftwar/util/dao/ScoreboardDaoSharedPreferences.kt
+++ b/app/src/main/java/net/imshit/aircraftwar/util/dao/ScoreboardDaoSharedPreferences.kt
@@ -8,7 +8,7 @@ class ScoreboardDaoSharedPreferences(context: Context, gameMode: Difficulty) : S
     private val sharedPreferences =
         context.getSharedPreferences("record-${gameMode.name}", Context.MODE_PRIVATE)
 
-    private val buffer = mutableListOf<ScoreInfo>()
+    val buffer = mutableListOf<ScoreInfo>()
 
     init {
         val size = this.sharedPreferences.getInt("size", 0)
@@ -42,7 +42,7 @@ class ScoreboardDaoSharedPreferences(context: Context, gameMode: Difficulty) : S
         indices.sortedDescending().forEach(this.buffer::removeAt)
     }
 
-    override fun deleteAll() {
+    override fun clear() {
         this.buffer.clear()
     }
 
diff --git a/app/src/main/res/layout/scoreboard_view_item.xml b/app/src/main/res/layout/scoreboard_view_item.xml
index e24a7ee..e0f99ba 100644
--- a/app/src/main/res/layout/scoreboard_view_item.xml
+++ b/app/src/main/res/layout/scoreboard_view_item.xml
@@ -2,12 +2,12 @@
 <androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/sbvi_card"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_margin="10dp"
-    app:cardCornerRadius="15dp"
-
-    >
+    android:layout_marginHorizontal="20dp"
+    android:layout_marginVertical="15dp"
+    app:cardCornerRadius="15dp">
 
     <LinearLayout
         android:layout_width="match_parent"