diff --git a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/EssService.java b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/EssService.java
index 0394e0e1..072da641 100644
--- a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/EssService.java
+++ b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/EssService.java
@@ -77,6 +77,7 @@ public class EssService {
 	public String getEmbedWebUrl(GetEmbedWebUrlRequest request) {
 		EssPerson contextPerson;
 		if (request.getEmbedType().essSubject() == EssSubject.CONTRACT) {
+			BizAssertions.assertNotBlank(request.getBusinessId(), "合同ID不能为空");
 			EssContract contract = essContractDao.getOrThrow(request.getBusinessId());
 			contextPerson = contractManager.getContractSuperAdmin(contract);
 		}