The invention discloses a telescopic crossing-over frame, which is characterized by comprising a frame body, a control mechanism and an execution mechanism, wherein the control mechanism comprises a hydraulic console arranged on the frame body; the execution mechanism comprises a telescopic arm controlled by the hydraulic console and a butt connector arranged at the front end of the telescopic arm; and the telescopic arm comprises a hard network closing holding pole and a holding pole rigid connector. During the mounting process, the action is stable and reliable, a jamming phenomenon does nothappen easily, and the structure is stable and reliable; the construction workload is saved, the network closing time is shortened, and the project cost is reduced; a distortion phenomenon caused byasynchronous movement at two sides is not generated easily, and the fault possibility is reduced; the network closing speed is quick, the power output process is stable, no jamming phenomenon happenseasily, the safety and the reliability are high, a network closing big arm adopts a box-type structure, the structure is stable, network closing protection is carried out through the hard network closing holding pole, and in comparison with the traditional soft network closing, advantages of strong impact resistance, high safety and reliability are achieved.