The invention discloses a submarine cable bracket. Mounting guide pipes are arranged on two sides of a collet; a lathedog is arranged on the collet; the collet is fixed with a main beam through bottom supporting rods; the two ends of the collet take the shapes of bent arcs; the bending radius of each of the bent arc is greater than the minimum bending radius of the submarine cable; the bottom supporting rods are arranged between the two bent arcs of the collet at the bottom of the collet and the supporting rods respectively; screw holes are formed in two sides of the horizontal section of the collet respectively; screw holes bolted with the two sides of the horizontal section of the collet are formed in two sides, paralleled with the collet, of the lathedog to enable the lathedog to be arranged on the upper part of the collet and bolted; the two ends of each of the mounting guide pipes are bent sections, the mounting guide pipes are fixed with the two sides of the collet through supporting guide pipes; an included angle between the supporting guide pipe at one bent section of the mounting guide pipe and the collet is larger than the included angle between the supporting guide pipe at the other bent section of the mounting guide pipe and the collet; the end of the larger included angle formed between the supporting guide pipe at one bent section of the mounting guide pipe and the collet is a cable mounting inlet, and the end of the smaller included angle formed between the supporting guide pipe at the other bent section of the mounting guide pipe and the collet is a cable mounting outlet, so that the cable automatically enters the collet of the submarine cable bracket and the cable mounting is convenient and efficient.