diff --git a/src/commands/status.rs b/src/commands/status.rs
index e36b89b..8aa91be 100644
--- a/src/commands/status.rs
+++ b/src/commands/status.rs
@@ -1,6 +1,10 @@
 use std::path::PathBuf;
 
-use crate::{head, models::index, utils::util};
+use crate::{
+    head,
+    models::{blob, index},
+    utils::util,
+};
 
 /** 获取需要commit的更改 */
 pub struct Changes {
@@ -37,25 +41,90 @@ pub fn changes_to_be_committed() -> Changes {
 
     let commit = crate::models::commit::Commit::load(&head_hash);
     let tree = commit.get_tree();
-    let mut tree_files = tree.get_recursive_blobs();
-    let mut index_files: Vec<PathBuf> = index
+    let tree_files = tree.get_recursive_blobs();
+    let index_files: Vec<PathBuf> = index
         .get_tracked_files()
         .iter()
         .map(|f| util::to_root_relative_path(f))
         .collect();
 
     for tree_item in tree_files.iter() {
-        if index_files.contains(&tree_item.0) {
-            // 比较文件内容
-            // XXX @mrbeanc 我看到Blob的new被改成调用save了。这里的实现希望比较Blob内容，不然就得读取文件内容。
-        } else {
+        let index_file = index_files.iter().find(|f| **f == tree_item.0);
+        if index_file.is_none() {
             change.deleted.push(__file_string(&tree_item.0));
+        } else {
+            let index_blob = blob::Blob::new(
+                util::get_working_dir()
+                    .unwrap()
+                    .join(index_file.unwrap())
+                    .as_path(),
+            );
+            // XXX @mrbeanc 我看到Blob的new被改成调用save了。这里的实现希望比较Blob内容，不然就得读取文件内容。
+            if index_blob.get_hash() != tree_item.1.get_hash() {
+                change.modified.push(__file_string(&tree_item.0));
+            }
+        }
+    }
+    for index_file in index_files.iter() {
+        let tree_item = tree_files.iter().find(|f| f.0 == **index_file);
+        if tree_item.is_none() {
+            change.new.push(__file_string(&index_file));
         }
     }
-
     change
 }
 
 pub fn status() {
     unimplemented!()
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::{commands::commit, utils::util};
+    use std::{fs, path::Path};
+
+    #[test]
+    fn test_changes_to_be_committed() {
+        util::setup_test_with_clean_mit();
+        let test_file = "a.txt";
+        util::ensure_test_file(Path::new(test_file), None);
+
+        commit::commit("test commit".to_string(), true);
+        let mut index = index::Index::new();
+        index.add(
+            PathBuf::from(test_file),
+            index::FileMetaData::new(&blob::Blob::new(Path::new(test_file)), Path::new(test_file)),
+        );
+        index.save();
+        let change = changes_to_be_committed();
+        assert_eq!(change.new.len(), 1);
+        assert_eq!(change.modified.len(), 0);
+        assert_eq!(change.deleted.len(), 0);
+
+        commit::commit("test commit".to_string(), true);
+        util::ensure_test_file(Path::new(test_file), Some("new content"));
+        index.add(
+            PathBuf::from(test_file),
+            index::FileMetaData::new(&blob::Blob::new(Path::new(test_file)), Path::new(test_file)),
+        );
+        index.save();
+        let change = changes_to_be_committed();
+        assert_eq!(change.new.len(), 0);
+        assert_eq!(change.modified.len(), 1);
+        assert_eq!(change.deleted.len(), 0);
+
+        commit::commit("test commit".to_string(), true);
+        index.remove(
+            util::get_working_dir()
+                .unwrap()
+                .join(Path::new(test_file))
+                .as_path(),
+        );
+        index.save();
+        let change = changes_to_be_committed();
+        assert_eq!(change.new.len(), 0);
+        assert_eq!(change.modified.len(), 0);
+        assert_eq!(change.deleted.len(), 1);
+    }
+}