The invention discloses a cable switching device, comprising two connecting seats, wherein each connecting seat comprises a shell, a setting groove is fixed on the inner wall of the shell, a conductive block is arranged in the setting groove, and a cable is electrically connected to the conductive block after sequentially penetrating through two cable penetration holes; a clamping mechanism is arranged in the setting groove; a conductive sliding block is slidably arranged in a sliding groove, the clamping mechanism comprises two clamping rings, and each of the clamping rings is provided with aswing rod assembly; each swing rod assembly comprises a swing rod, one end of each swing rod is connected with the clamping ring, the other end of each swing rod is connected with a wedge block, an ejector rod assembly is arranged between the two wedge blocks, the ejector rod assembly comprises an ejector rod that is connected with the conductive block and penetrates through a communication holeand a top block that is connected to the ejector rod and penetrates out of the end part of the sliding groove, the top block is in the shape of isosceles trapezoid, and two oblique sides of the top block are slidably abutted against the wedge surfaces of the two wedge blocks respectively. Compared with the prior art, by adopting the scheme of the invention, the stability performance of the cablesafter connection can be improved, and the line can be maintained in a normal state for a long time.