diff --git a/collection/opendb-msg/opendb-msg.schema.json b/collection/opendb-msg/opendb-msg.schema.json
new file mode 100644
index 0000000..eb49e09
--- /dev/null
+++ b/collection/opendb-msg/opendb-msg.schema.json
@@ -0,0 +1,65 @@
+{
+	"schema": {
+		"bsonType": "object",
+		"required": ["to_uid", "body", "type"],
+		"permission": {
+			"read": "auto.uid == doc.to_uid",
+			"create": true,
+			"update": false,
+			"delete": false
+		},
+		"properties": {
+			"_id": {
+				"description": "ID，系统自动生成"
+			},
+			"from_uid": {
+				"description": "消息发送方 UserID（用于指定发送消息方帐号）",
+				"forceDefaultValue": {
+					"$env": "uid"
+				}
+			},
+			"to_uid": {
+				"description": "消息接收方 UserID",
+				"bsonType": "string"
+			},
+			"is_read": {
+				"description": "是否已读",
+				"bsonType": "bool",
+				"forceDefaultValue": false
+			},
+			"create_date": {
+				"description": "消息发送时间戳",
+				"forceDefaultValue": {
+					"$env": "now"
+				}
+			},
+			"body": {
+				"bsonType": "object",
+				"description": "消息内容，包含的键会随type变化。需要自己写valedateFunction验证"
+			},
+			"type": {
+				"bsonType": "string",
+				"enum": [{
+					"text": "文本",
+					"value": "text"
+				}, {
+					"text": "图像",
+					"value": "image"
+				}, {
+					"text": "语音",
+					"value": "sound"
+				}, {
+					"text": "视频",
+					"value": "video"
+				}, {
+					"text": "文件",
+					"value": "file"
+				}, {
+					"text": "位置",
+					"value": "location"
+				}]
+			}
+		}
+	},
+	"index": []
+}
\ No newline at end of file