The utility model discloses a skid -mounted formula additive filling device relates to vehicular fuel oil additive loading technique field. This sled dress formula additive filling device is includingsled seat be provided with the connecting piece on the bottom surface of sled seat be fixed with the filling subassembly on the top surface of sled seat, the filling subassembly includes additive tank, with additive tank intercommunication, be used for to additive tank pour into into the additive unload dose pump and at least one and additive tank intercommunication, be used for with additive among the additive tank pours into oil pipeline's dose pump that adds into. Through the embodiment of the utility model provides an additive injection device can need not the artificial directly to adding the additive among the oil pipeline, has reduced staff's amount of labour. Simultaneously when the filling, also need not open oil tank car roof again, avoid because of opening environmental pollution and the potential safety hazard that the top cap makeed oil gas volatilization in the tank wagon bring.