diff --git a/vnpy/gateway/oes/oes_td.py b/vnpy/gateway/oes/oes_td.py
index dccb3dfb..151a2015 100644
--- a/vnpy/gateway/oes/oes_td.py
+++ b/vnpy/gateway/oes/oes_td.py
@@ -468,6 +468,7 @@ class OesTdApi:
             name=data.securityName,
             product=PRODUCT_OES2VT[data.mktId],
             size=data.buyQtyUnit,
+            min_volume=100,
             net_position=True,
             pricetick=data.priceUnit,
         )