Telescopic jib structure and engineering truck

The invention discloses a kind of telescopic jib structure and engineering truck, wherein, described telescopic jib structure includes carrying rope (1), it is connected to the jib of frame (2) and includes main support (3) and the bracket institution of auxiliary stand (4), described main support (3) is connected to described frame (2), described auxiliary stand (4) includes the auxiliary stand bar (41) being connected on described jib, one end of described carrying rope (1) is connected to the afterbody of described jib, the other end of described carrying rope (1) is connected to the stem of described jib, described bracket institution at least has operating position, in described operating position, described carrying rope (1) is by described main support (3) and auxiliary stand (4) tensioning.The intensity of this telescopic jib structure, rigidity and bearing capacity are obtained for and promote significantly.