diff --git a/src/document_highlight/mod.rs b/src/document_highlight/mod.rs
index ea9f358..1530789 100644
--- a/src/document_highlight/mod.rs
+++ b/src/document_highlight/mod.rs
@@ -12,7 +12,7 @@ impl LSPServer {
         &self,
         params: DocumentHighlightParams,
     ) -> Option<Vec<DocumentHighlight>> {
-        let uri = params.text_document_position_params.text_document.uri;
+        let uri = &params.text_document_position_params.text_document.uri;
         let pos = params.text_document_position_params.position;
         let file_id = self.srcs.get_id(&uri).to_owned();
         self.srcs.wait_parse_ready(file_id, false);
@@ -24,7 +24,7 @@ impl LSPServer {
         let language_id = get_language_id_by_uri(&uri);
         
         match language_id.as_str() {
-            "vhdl" => vhdl_document_highlight(),
+            "vhdl" => vhdl_document_highlight(self, &params.text_document_position_params),
             "verilog" | "systemverilog" => sv_document_highlight(
                 self,
                 &token,
diff --git a/src/document_highlight/vhdl.rs b/src/document_highlight/vhdl.rs
index 6eeca88..e62de6b 100644
--- a/src/document_highlight/vhdl.rs
+++ b/src/document_highlight/vhdl.rs
@@ -1,5 +1,49 @@
+use std::{path::PathBuf, str::FromStr};
+
+use log::info;
 use tower_lsp::lsp_types::*;
 
-pub fn vhdl_document_highlight() -> Option<Vec<DocumentHighlight>> {
-    None
+use crate::{server::LSPServer, utils::{from_lsp_pos, to_escape_path, to_lsp_range}};
+
+pub fn vhdl_document_highlight(
+    server: &LSPServer,
+    params: &TextDocumentPositionParams
+) -> Option<Vec<DocumentHighlight>> {
+    let uri = &params.text_document.uri;
+    let file_id = server.srcs.get_id(&uri).to_owned();
+    server.srcs.wait_parse_ready(file_id, false);
+    let projects = server.srcs.design_file_map.read().ok()?;
+
+    let path = match PathBuf::from_str(uri.path()) {
+        Ok(path) => path,
+        Err(error) => {
+            info!("error happen in <goto_include_definition>: {:?}", error);
+            return None;
+        }
+    };
+    let escape_path = to_escape_path(&path);
+    let escape_path_string = escape_path.to_str().unwrap_or("");
+    if escape_path_string.len() == 0 {
+        info!("error happen in [vhdl_parser_pipeline], escape_path_string is empty");
+        return None;
+    }
+    let project = match projects.get(escape_path_string) {
+        Some(project) => project,
+        None => return None
+    };
+
+    let source = project.get_source(&escape_path)?;
+
+    let ent = project.find_declaration(&source, from_lsp_pos(params.position))?;
+
+    Some(
+        project
+            .find_all_references_in_source(&source, ent)
+            .iter()
+            .map(|pos| DocumentHighlight {
+                range: to_lsp_range(pos.range()),
+                kind: Some(DocumentHighlightKind::TEXT),
+            })
+            .collect(),
+    )
 }
\ No newline at end of file