The invention relates to a reinforcing steel taper threaded connection technique. In the construction of bridge engineering, the problems of the connection technique of reinforcing steels and the connection quality always trouble extensive engineering technical personnel. In the conventional construction technique, the method of welding or binding (certain structures cannot be bound) is always adopted. The construction efficiency is low and is affected by the climate greatly, the labor intensity is large, and the quality is very difficult to ensure. The technique consists of the steps of preparatory work, taper thread processing and manufacturing, reinforcing cage manufacturing and reinforcing cage mounting, wherein the step of the reinforcing cage manufacturing comprises the following steps: hanging the bed section of the reinforcing cage into to a hole; temporarily fixing the top end of the reinforcing cage on a protective barrel; cutting off auxiliary supporting bars in the processof putting the reinforcing cage into the hole for repeated reuse; lifting up the second section of the reinforcing cage to butt with the bed section of reinforcing cage; adjusting an arm lever of a crane, and simultaneously rotating the reinforcing cage so that main bars corresponding to the two sections of the reinforcing cages are butted together; and using a torque wrench to screw down sleeves.The technique is applied to bridge constructions.