diff --git a/internal/gateway/models.go b/internal/gateway/models.go
index 3bd8618..b2541e9 100644
--- a/internal/gateway/models.go
+++ b/internal/gateway/models.go
@@ -216,8 +216,9 @@ type SyncDeviceInfoResp struct {
 	LANIP     string `json:"lan_ip" description:"局域网网关IP地址"`
 
 	// 连接相关（D-10 补全）
-	MaxClients  FlexInt `json:"max_clients" description:"最大连接客户端数"`
-	ConnectTime string  `json:"connect_time" description:"设备本次联网时间(秒)"`
+	MaxClients   FlexInt `json:"max_clients" description:"最大连接客户端数"`
+	ClientNumber FlexInt `json:"client_number" description:"当前已连接客户端数"`
+	ConnectTime  string  `json:"connect_time" description:"设备本次联网时间(秒)"`
 
 	// 设备属性（D-10 补全）
 	Status       FlexInt `json:"status" description:"设备状态：1=正常，0=禁用"`
diff --git a/internal/handler/app/client_asset.go b/internal/handler/app/client_asset.go
index 3c8d5a0..f2b3903 100644
--- a/internal/handler/app/client_asset.go
+++ b/internal/handler/app/client_asset.go
@@ -653,6 +653,10 @@ func mapDeviceGatewayInfoToClientInfo(g *dto.DeviceGatewayInfo) *dto.DeviceRealt
 		v := int64(*g.MaxClients)
 		info.MaxClients = &v
 	}
+	if g.ClientNumber != nil {
+		v := int64(*g.ClientNumber)
+		info.ClientNumber = &v
+	}
 	info.SoftwareVersion = g.SoftwareVersion
 	if g.SwitchMode != nil {
 		// SwitchMode 在 B 端为字符串（"0"/"1"），C 端为整型（0/1），需解析转换
diff --git a/internal/model/dto/asset_dto.go b/internal/model/dto/asset_dto.go
index 68d94cc..d82572c 100644
--- a/internal/model/dto/asset_dto.go
+++ b/internal/model/dto/asset_dto.go
@@ -184,6 +184,7 @@ type DeviceGatewayInfo struct {
 	// 设备属性
 	CurrentIccid    *string `json:"current_iccid,omitempty" description:"当前使用的ICCID"`
 	MaxClients      *int    `json:"max_clients,omitempty" description:"最大连接客户端数"`
+	ClientNumber    *int    `json:"client_number,omitempty" description:"当前已连接客户端数"`
 	SoftwareVersion *string `json:"software_version,omitempty" description:"软件版本号"`
 	SwitchMode      *string `json:"switch_mode,omitempty" description:"切卡模式：0=自动，1=手动"`
 	SyncInterval    *int    `json:"sync_interval,omitempty" description:"信息上报周期(秒)"`
diff --git a/internal/model/dto/client_asset_dto.go b/internal/model/dto/client_asset_dto.go
index 34cc1ed..88d5d0e 100644
--- a/internal/model/dto/client_asset_dto.go
+++ b/internal/model/dto/client_asset_dto.go
@@ -103,6 +103,7 @@ type DeviceRealtimeInfo struct {
 	// === 设备属性 ===
 	CurrentIccid    *string `json:"current_iccid,omitempty" description:"当前使用的ICCID"`
 	MaxClients      *int64  `json:"max_clients,omitempty" description:"最大连接客户端数"`
+	ClientNumber    *int64  `json:"client_number,omitempty" description:"当前已连接客户端数"`
 	SoftwareVersion *string `json:"software_version,omitempty" description:"软件版本号"`
 	SwitchMode      *int    `json:"switch_mode,omitempty" description:"切卡模式（0:自动, 1:手动）"`
 	SyncInterval    *int64  `json:"sync_interval,omitempty" description:"信息上报周期(秒)"`
diff --git a/internal/service/asset/service.go b/internal/service/asset/service.go
index e6f2a2b..d679945 100644
--- a/internal/service/asset/service.go
+++ b/internal/service/asset/service.go
@@ -385,6 +385,7 @@ func mapSyncRespToDeviceGatewayInfo(r *gateway.SyncDeviceInfoResp) *dto.DeviceGa
 		LimitSpeed:      flexIntPtr(r.LimitSpeed),
 		CurrentIccid:    strPtr(r.CurrentIccid),
 		MaxClients:      flexIntPtr(r.MaxClients),
+		ClientNumber:    flexIntPtr(r.ClientNumber),
 		SoftwareVersion: strPtr(r.SoftwareVersion),
 		SwitchMode:      strPtr(r.SwitchMode),
 		SyncInterval:    flexIntPtr(r.SyncInterval),