The utility model discloses an auxiliary agent interpolation device for organosilicon production. Including the body, the body is the nonrust steel pipe of a nipple joint, the lower port of body and the big port rigid coupling of tapered pipe, and the last port of body is the feed inlet, and the miniport of tapered pipe is the discharge gate, and the outer circumference of discharge gate is equipped with first flange, and the outer circumference of feed inlet is equipped with the second flange, and the upper surface of second flange is higher than the up end of body, and the upper cover lid closes on the second flange, is equipped with sealed the pad between upper cover and the second flange, be provided with upper cover closing mechanism between upper cover and the body, the middle part of body side be equipped with with body axis vertically intake pipe, the discharge gate passes through discharge pipeline and storage hopper intercommunication, intake pipe and nitrogen gas pipeline intercommunication. Which prolongs the service life of wefts.