The utility model discloses a positioning crane telescopic beam. The positioning crane telescopic beam is installed between a crane main body and a lifting appliance, and comprises a beam seat at the top, fixed beams extending downward, moving beams and connecting beams; the beam seat is provided with a matching part for connecting with the crane main body; the fixed beams are fixedly connected with the beam seat; the moving beams are arranged in the fixed beams in a cup joint mode; the connecting beams are arranged in the moving beams in a cup joint mode; the tail ends of the connecting beams are provided with connecting parts connected with the lifting appliance. The positioning crane telescopic beam disclosed by the utility model has the advantages of stable lifting and transportation, high efficiency and the like.