Cable fastening device

The utility model discloses a cable fastening device, which comprises a mounting bracket, a clamping structure and a positioning structure, the clamping structure is arranged on the mounting bracket, the clamping structure comprises two clamping plates which are opposite in the vertical direction, and the position of at least one of the clamping plates is movably adjustable in the vertical direction; the positioning structure is arranged between the two clamping plates and comprises a positioning partition plate and two matched pressing plates arranged on the upper side and the lower side of the positioning partition plate respectively, the matched pressing plates abut against the corresponding clamping plates respectively, and first positioning grooves penetrating in the front-back direction are formed in the upper end face and the lower end face of the positioning partition plate respectively. And the two matched pressing plates are respectively used for pressing the in-phase cable to the corresponding firs