diff --git a/examples/highfreq/workflow_config_High_Freq_Tree_Alpha158.yaml b/examples/highfreq/workflow_config_High_Freq_Tree_Alpha158.yaml
index ca8e92d08..c21ef1da3 100644
--- a/examples/highfreq/workflow_config_High_Freq_Tree_Alpha158.yaml
+++ b/examples/highfreq/workflow_config_High_Freq_Tree_Alpha158.yaml
@@ -32,7 +32,7 @@ data_handler_config: &data_handler_config
     
 task:
     model:
-        class: "HF_LGBModel"
+        class: "HFLGBModel"
         module_path: "qlib.contrib.model.highfreq_gdbt_model"
         kwargs:
             objective: 'binary'
diff --git a/qlib/contrib/eva/alpha.py b/qlib/contrib/eva/alpha.py
index 8078dd4ed..fadef9d16 100644
--- a/qlib/contrib/eva/alpha.py
+++ b/qlib/contrib/eva/alpha.py
@@ -8,12 +8,23 @@ import pandas as pd
 from typing import Tuple
 
 
-def calc_prec(
+def calc_long_short_prec(
     pred: pd.Series, label: pd.Series, date_col="datetime", quantile: float = 0.2, dropna=False, is_alpha=False
 ) -> Tuple[pd.Series, pd.Series]:
-    """calculate the precision
-    pred :
-        pred
+    """
+    calculate the precision for long and short operation
+
+
+    :param pred/label: index is **pd.MultiIndex**, index name is **[datetime, instruments]**; columns names is **[score]**.
+
+            .. code-block:: python
+                                                  score
+                datetime            instrument
+                2020-12-01 09:30:00 SH600068    0.553634
+                                    SH600195    0.550017
+                                    SH600276    0.540321
+                                    SH600584    0.517297
+                                    SH600715    0.544674
     label :
         label
     date_col :
@@ -25,7 +36,7 @@ def calc_prec(
         long precision and short precision in time level
     """
     if is_alpha:
-        label = label - label.mean(level=0)
+        label = label - label.mean(level=date_col)
     if int(1 / quantile) >= len(label.index.get_level_values(1).unique()):
         raise ValueError("Need more instruments to calculate precision")
 
@@ -41,13 +52,13 @@ def calc_prec(
     short = group.apply(lambda x: x.nsmallest(N(x), columns="pred").label).reset_index(level=0, drop=True)
 
     groupll = long.groupby(date_col)
-    ll_ration = groupll.apply(lambda x: x > 0)
-    ll_c = groupll.count()
+    l_dom = groupll.apply(lambda x: x > 0)
+    l_c = groupll.count()
 
     groups = short.groupby(date_col)
-    s_ration = groups.apply(lambda x: x < 0)
+    s_dom = groups.apply(lambda x: x < 0)
     s_c = groups.count()
-    return (ll_ration.groupby(date_col).sum() / ll_c), (s_ration.groupby(date_col).sum() / s_c)
+    return (l_dom.groupby(date_col).sum() / l_c), (s_dom.groupby(date_col).sum() / s_c)
 
 
 def calc_ic(pred: pd.Series, label: pd.Series, date_col="datetime", dropna=False) -> Tuple[pd.Series, pd.Series]:
diff --git a/qlib/contrib/model/highfreq_gdbt_model.py b/qlib/contrib/model/highfreq_gdbt_model.py
index 62e45c841..5a2eeb50a 100644
--- a/qlib/contrib/model/highfreq_gdbt_model.py
+++ b/qlib/contrib/model/highfreq_gdbt_model.py
@@ -11,8 +11,8 @@ from qlib.data.dataset.handler import DataHandlerLP
 import warnings
 
 
-class HF_LGBModel(ModelFT):
-    """LightGBM Model"""
+class HFLGBModel(ModelFT):
+    """LightGBM Model for high frequency prediction"""
 
     def __init__(self, loss="mse", **kwargs):
         if loss not in {"mse", "binary"}:
diff --git a/qlib/workflow/record_temp.py b/qlib/workflow/record_temp.py
index c47b999f3..239527fa0 100644
--- a/qlib/workflow/record_temp.py
+++ b/qlib/workflow/record_temp.py
@@ -13,7 +13,7 @@ from ..data.dataset.handler import DataHandlerLP
 from ..utils import init_instance_by_config, get_module_by_module_path
 from ..log import get_module_logger
 from ..utils import flatten_dict
-from ..contrib.eva.alpha import calc_ic, calc_long_short_return, calc_prec
+from ..contrib.eva.alpha import calc_ic, calc_long_short_return, calc_long_short_prec
 from ..contrib.strategy.strategy import BaseStrategy
 
 logger = get_module_logger("workflow", "INFO")
@@ -169,8 +169,7 @@ class HFSignalRecord(SignalRecord):
     def generate(self):
         pred = self.load("pred.pkl")
         raw_label = self.load("label.pkl")
-
-        long_pre, short_pre = calc_prec(pred.iloc[:, 0], raw_label.iloc[:, 0], is_alpha=True)
+        long_pre, short_pre = calc_long_short_prec(pred.iloc[:, 0], raw_label.iloc[:, 0], is_alpha=True)
         ic, ric = calc_ic(pred.iloc[:, 0], raw_label.iloc[:, 0])
         metrics = {
             "IC": ic.mean(),
@@ -205,8 +204,9 @@ class HFSignalRecord(SignalRecord):
             self.get_path("ric.pkl"),
             self.get_path("long_pre.pkl"),
             self.get_path("short_pre.pkl"),
+            self.get_path("long_short_r.pkl"),
+            self.get_path("long_avg_r.pkl"),
         ]
-        paths.extend([self.get_path("long_short_r.pkl"), self.get_path("long_avg_r.pkl")])
         return paths