diff --git a/paperforge/worker/ocr.py b/paperforge/worker/ocr.py
index f33d7c4f..7a9697da 100644
--- a/paperforge/worker/ocr.py
+++ b/paperforge/worker/ocr.py
@@ -48,6 +48,7 @@ from paperforge.worker._utils import (
 )
 from paperforge.worker.asset_index import refresh_index_entry
 from paperforge.worker.ocr_artifacts import artifact_paths_for_key, build_version_payload, compute_pdf_fingerprint, compute_json_hash
+from paperforge.worker.ocr_blocks import build_raw_blocks_for_result_lines, write_raw_blocks_jsonl
 from paperforge.worker.sync import (
     load_control_actions,
     load_export_rows,
@@ -1726,11 +1727,11 @@ def postprocess_ocr_result(vault: Path, key: str, all_results: list[dict]) -> tu
     }
     write_json(artifacts.source_metadata, source_meta)
 
-    # Ensure canonical and structure directories exist (Phase 1 placeholders)
+    # Emit canonical raw blocks
     artifacts.blocks_raw.parent.mkdir(parents=True, exist_ok=True)
     artifacts.blocks_structured.parent.mkdir(parents=True, exist_ok=True)
-    if not artifacts.blocks_raw.exists():
-        artifacts.blocks_raw.write_text("", encoding="utf-8")
+    all_raw_blocks = build_raw_blocks_for_result_lines(key, all_results)
+    write_raw_blocks_jsonl(artifacts.blocks_raw, all_raw_blocks)
     if not artifacts.blocks_structured.exists():
         artifacts.blocks_structured.write_text("", encoding="utf-8")
 
diff --git a/paperforge/worker/ocr_blocks.py b/paperforge/worker/ocr_blocks.py
new file mode 100644
index 00000000..44d5e07b
--- /dev/null
+++ b/paperforge/worker/ocr_blocks.py
@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from typing import Any
+
+
+def build_raw_blocks_for_page(paper_id: str, page: int, result: dict) -> list[dict[str, Any]]:
+    pruned = result.get("prunedResult", {})
+    width = pruned.get("width", 0)
+    height = pruned.get("height", 0)
+    blocks = pruned.get("parsing_res_list", [])
+    rows = []
+    for i, block in enumerate(blocks):
+        rows.append({
+            "paper_id": paper_id,
+            "page": page,
+            "block_id": block.get("block_id", f"p{page}_b{i}"),
+            "raw_label": block.get("block_label", "unknown"),
+            "raw_order": block.get("block_order", i),
+            "bbox": block.get("block_bbox", [0, 0, 0, 0]),
+            "text": block.get("block_content", "") or "",
+            "page_width": width,
+            "page_height": height,
+            "source": "ocr_raw",
+        })
+    return rows
+
+
+def build_raw_blocks_for_result_lines(paper_id: str, all_results: list[dict]) -> list[dict[str, Any]]:
+    rows = []
+    page_num = 0
+    for payload in all_results:
+        for res in payload.get("layoutParsingResults", []):
+            page_num += 1
+            rows.extend(build_raw_blocks_for_page(paper_id, page_num, res))
+    return rows
+
+
+def write_raw_blocks_jsonl(path: Path, rows: list[dict[str, Any]]) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with path.open("w", encoding="utf-8") as f:
+        for row in rows:
+            f.write(json.dumps(row, ensure_ascii=False) + "\n")
diff --git a/tests/test_ocr_blocks.py b/tests/test_ocr_blocks.py
new file mode 100644
index 00000000..6f8829a3
--- /dev/null
+++ b/tests/test_ocr_blocks.py
@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+
+def test_build_raw_blocks_preserves_every_block() -> None:
+    from paperforge.worker.ocr_blocks import build_raw_blocks_for_page
+
+    result = {
+        "prunedResult": {
+            "width": 1200,
+            "height": 1600,
+            "parsing_res_list": [
+                {"block_id": 1, "block_label": "text", "block_order": 0, "block_bbox": [1, 2, 3, 4], "block_content": "A"},
+                {"block_id": 2, "block_label": "header", "block_order": 1, "block_bbox": [5, 6, 7, 8], "block_content": "B"},
+            ],
+        }
+    }
+
+    rows = build_raw_blocks_for_page("KEY001", 1, result)
+
+    assert len(rows) == 2
+    assert rows[0]["paper_id"] == "KEY001"
+    assert rows[1]["raw_label"] == "header"
diff --git a/tests/test_ocr_integration_fixtures.py b/tests/test_ocr_integration_fixtures.py
index 6b6fed81..90b62526 100644
--- a/tests/test_ocr_integration_fixtures.py
+++ b/tests/test_ocr_integration_fixtures.py
@@ -3,6 +3,8 @@ from __future__ import annotations
 import json
 from pathlib import Path
 
+import pytest
+
 OCR_CORPUS = Path("D:/L/OB/Literature-hub/System/PaperForge/ocr")
 
 
@@ -111,3 +113,24 @@ def test_session_regression_figure_not_in_unrelated_section() -> None:
             continue
 
     assert True
+
+
+def test_fixture_raw_blocks_nonzero(tmp_path) -> None:
+    """Load a real result.json, write blocks.raw.jsonl, verify rows."""
+    key = "2GN9LMCW"
+    json_path = _load_json_path(key)
+    if not json_path or not json_path.exists():
+        pytest.skip("fixture not available")
+
+    data = json.loads(json_path.read_text(encoding="utf-8"))
+    from paperforge.worker.ocr_blocks import build_raw_blocks_for_result_lines, write_raw_blocks_jsonl
+
+    rows = build_raw_blocks_for_result_lines(key, data)
+    assert len(rows) > 0
+
+    out_dir = tmp_path / key
+    out_dir.mkdir(parents=True)
+    out_path = out_dir / "blocks.raw.jsonl"
+    write_raw_blocks_jsonl(out_path, rows)
+    assert out_path.exists()
+    assert out_path.stat().st_size > 0