Adjustable cable fixing support

The invention discloses an adjustable cable fixing support. The support comprises a connecting frame and an adjustable hoop, where the adjustable hoop comprises a rear hoop ring, a front left hoop ring and a front right hoop ring, a first adjusting long groove and a second adjusting long groove are respectively formed at two ends of the rear hoop, a third adjusting long groove is formed at a rearend of the front left hoop ring, a fourth adjusting long groove is formed at a rear end of the front right hoop ring, the front left hoop ring is connected with the rear hoop ring through a first locking piece, the front right hoop ring is connected with the rear hoop ring through a second locking piece, a left folding lug is arranged at a front end of the front left hoop ring, a right folding lugis arranged at a front end of the front right hoop ring, the left folding lug and the right folding lug are connected through a third locking piece, the adjustable hoop is further mounted on the connecting frame through a fir