The utility model discloses a waterproof valve rod sleeve comprising a cylinder body, wherein a columnar projection is arranged at the top end of the cylinder body, a columnar hole is formed in the axle center of the columnar projection, a choke plug for sealing the columnar hole is arranged at the columnar hole, the choke plug is composed of a columnar body placed in the columnar hole and a cap body arranged at one end of the columnar body, an external thread is arranged on the columnar body, internal thread grooves matched with the external thread of the columnar body are formed in the wall of the columnar hole, and a through valve rod hole is formed in the axle center of the choke plug; an external thread connected with a gear box is arranged at the bottom end of the cylinder body, a flange is arranged above the external thread, an annular groove is formed in the lower part of the flange, and an O-shaped sealing ring is fixed in the annular groove. The waterproof valve rod sleeve disclosed by the utility model has good sealing performance, thereby being capable of effectively preventing rain from entering the gear box, avoiding accumulated water in the gear box and relieving the corrosion of components in the gear box so as to prolong the next maintenance time of the valve and greatly save the maintenance cost, and as a result, the economic benefit is obvious.