Combined telescopic anchor rod

The utility model provides a combined telescopic anchor rod, which is suitable for soft rock with a large deformation amount or a roadway surrounding rock support greatly influenced by the mining. The combined telescopic anchor rod comprises a front section of anchor rod body and a back section of anchor rod body which are inserted into a drill hole injected with cement size, wherein at least one fusiform spring is arranged between the front and back sections of anchor rod bodies and is respectively welded with the front and back sections of anchor rod bodies via a casing pipe; an elastic backing plate fixedly arranged at an orifice is arranged at the tail part of the back section of anchor rod body; and a nut for fixing the backing plate is arranged on the elastic backing plate. The telescopic amount of the anchor rod is partially replaced through the fusiform spring, the yielding performance of the anchor rod is remarkably increased, and an anchoring layer of surrounding rock is steadier on the premise that