diff --git a/tools/mix_data_ablation.py b/tools/mix_data_ablation.py
index b830c691..2c6d53c2 100644
--- a/tools/mix_data_ablation.py
+++ b/tools/mix_data_ablation.py
@@ -90,4 +90,5 @@
 mix_json['annotations'] = ann_list
 mix_json['videos'] = video_list
 mix_json['categories'] = category_list
-json.dump(mix_json, open('datasets/mix_mot_ch/annotations/train.json','w'))
\ No newline at end of file
+os.makedirs('datasets/mix_mot_ch/annotations', exist_ok=True)
+json.dump(mix_json, open('datasets/mix_mot_ch/annotations/train.json','w'))
diff --git a/tools/mix_data_test_mot17.py b/tools/mix_data_test_mot17.py
index 5d81855b..0583b0e2 100644
--- a/tools/mix_data_test_mot17.py
+++ b/tools/mix_data_test_mot17.py
@@ -148,4 +148,5 @@
 mix_json['annotations'] = ann_list
 mix_json['videos'] = video_list
 mix_json['categories'] = category_list
+os.makedirs('datasets/mix_det/annotations', exist_ok=True)
 json.dump(mix_json, open('datasets/mix_det/annotations/train.json','w'))
diff --git a/tools/mix_data_test_mot20.py b/tools/mix_data_test_mot20.py
index e7bbafc2..68c7e336 100644
--- a/tools/mix_data_test_mot20.py
+++ b/tools/mix_data_test_mot20.py
@@ -88,4 +88,5 @@
 mix_json['annotations'] = ann_list
 mix_json['videos'] = video_list
 mix_json['categories'] = category_list
-json.dump(mix_json, open('datasets/mix_mot20_ch/annotations/train.json','w'))
\ No newline at end of file
+os.makedirs('datasets/mix_mot20_ch/annotations', exist_ok=True)
+json.dump(mix_json, open('datasets/mix_mot20_ch/annotations/train.json','w'))