diff --git a/server-rs/crates/shared-contracts/src/model3d/common/mod.rs b/server-rs/crates/shared-contracts/src/model3d/common/mod.rs
index a4c3916b8..dfb3b03fa 100644
--- a/server-rs/crates/shared-contracts/src/model3d/common/mod.rs
+++ b/server-rs/crates/shared-contracts/src/model3d/common/mod.rs
@@ -1,7 +1,4 @@
-pub(crate) const MODEL3D_TS_EXPORT_DIR: &str = concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/../../../packages/shared/src/contracts/model3d/common/"
-);
+pub(crate) const MODEL3D_TS_EXPORT_DIR: &str = crate::model3d::model3d_ts_export_dir!("common/");
 
 mod compression;
 mod export_orientation;
diff --git a/server-rs/crates/shared-contracts/src/model3d/image_to_model/mod.rs b/server-rs/crates/shared-contracts/src/model3d/image_to_model/mod.rs
index 70006ce90..fc2591742 100644
--- a/server-rs/crates/shared-contracts/src/model3d/image_to_model/mod.rs
+++ b/server-rs/crates/shared-contracts/src/model3d/image_to_model/mod.rs
@@ -1,7 +1,5 @@
-pub(crate) const MODEL3D_TS_EXPORT_DIR: &str = concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/../../../packages/shared/src/contracts/model3d/image-to-model/"
-);
+pub(crate) const MODEL3D_TS_EXPORT_DIR: &str =
+    crate::model3d::model3d_ts_export_dir!("image-to-model/");
 
 mod request;
 
diff --git a/server-rs/crates/shared-contracts/src/model3d/mod.rs b/server-rs/crates/shared-contracts/src/model3d/mod.rs
index 3293af64e..1a5cffa72 100644
--- a/server-rs/crates/shared-contracts/src/model3d/mod.rs
+++ b/server-rs/crates/shared-contracts/src/model3d/mod.rs
@@ -1,5 +1,19 @@
 //! Provider-neutral 3D model generation contracts.
 
+/// 3D 模型契约的 ts-rs 生成根目录；各子目录只追加自己的目录名，
+/// 避免仓库相对路径在多处重复维护。
+macro_rules! model3d_ts_export_dir {
+    ($subdirectory:literal) => {
+        concat!(
+            env!("CARGO_MANIFEST_DIR"),
+            "/../../../packages/shared/src/contracts/model3d/",
+            $subdirectory
+        )
+    };
+}
+
+pub(crate) use model3d_ts_export_dir;
+
 pub mod common;
 pub mod image_to_model;
 pub mod multiview_to_model;
diff --git a/server-rs/crates/shared-contracts/src/model3d/multiview_to_model/mod.rs b/server-rs/crates/shared-contracts/src/model3d/multiview_to_model/mod.rs
index 48aeae756..cea6cb4d8 100644
--- a/server-rs/crates/shared-contracts/src/model3d/multiview_to_model/mod.rs
+++ b/server-rs/crates/shared-contracts/src/model3d/multiview_to_model/mod.rs
@@ -1,7 +1,5 @@
-pub(crate) const MODEL3D_TS_EXPORT_DIR: &str = concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/../../../packages/shared/src/contracts/model3d/multiview-to-model/"
-);
+pub(crate) const MODEL3D_TS_EXPORT_DIR: &str =
+    crate::model3d::model3d_ts_export_dir!("multiview-to-model/");
 
 mod request;
 
diff --git a/server-rs/crates/shared-contracts/src/model3d/text_to_model/mod.rs b/server-rs/crates/shared-contracts/src/model3d/text_to_model/mod.rs
index 569acfc33..70861cabb 100644
--- a/server-rs/crates/shared-contracts/src/model3d/text_to_model/mod.rs
+++ b/server-rs/crates/shared-contracts/src/model3d/text_to_model/mod.rs
@@ -1,7 +1,5 @@
-pub(crate) const MODEL3D_TS_EXPORT_DIR: &str = concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/../../../packages/shared/src/contracts/model3d/text-to-model/"
-);
+pub(crate) const MODEL3D_TS_EXPORT_DIR: &str =
+    crate::model3d::model3d_ts_export_dir!("text-to-model/");
 
 mod request;
 mod response;