The invention discloses a wind power support cylinder inner wall cable clamping seat, which comprises a front seat and a rear seat matched mutually, wherein an arc-shaped structure fitted with the inner wall of a support cylinder is formed in the rear end face of the rear seat; multiple groups of half slots are formed in the lower edge of the front seat and the upper edge of the rear seat; an upper bolt through hole is formed in the edge side of the front seat; a front bolt hole matched with the upper bolt through hole is formed in the front side of the rear seat; a lower bolt through hole installed with the inner wall of the support cylinder is formed in the edge side of the rear seat; a bolt hole matched with the lower bolt through hole is formed in the inner wall of the support cylinder. According to the wind power support cylinder inner wall cable clamping seat provided by the invention, the rear seat is matched, installed and fixed with the inner wall of the support cylinder through a bolt, a cable is then put in the half slots, and finally the front seat and the rear seat are fixedly installed through the bolt, so that the installation is simple and firm, and the cable has a certain movement space and can be stretched and retracted freely according to the seasons; the cable can be well protected.