Wiring device of crane telescopic boom

The utility model discloses a wiring device of a telescopic boom of a crane. The wiring device comprises a first pulley part, a second pulley part, a third pulley part and a fourth pulley part, the cable or the flexible pipeline is wound on the first pulley part, the cable or the flexible pipeline can slide around the first pulley part, one end of the cable or the flexible pipeline is fixed to the arm head of the outer arm, and the other end of the cable or the flexible pipeline is fixed to the arm head of the inner arm; and the tightening part is connected with the first pulley part and is used for providing tightening tension for the cable or the flexible pipeline. According to the utility model, all levels of cables or flexible pipelines are fixedly connected, and shielding cables can be used, so that a power supply and communication network can be formed on the suspension arm, an oil path can be connected through a hose, and more application space can be expanded. 本实用新型公开了一种起重机伸缩吊臂的布线装置，其包括：位于伸缩吊臂相邻的内臂和外臂