The invention discloses a tensile test cable clamp, which comprises an upper shell skeleton, a lower shell skeleton and a clamping assembly, wherein the upper shell skeleton and the lower shell skeleton are detachably connected to form a shell; a hollow cavity for accommodating the clamping assembly is arranged in the shell; a through hole, through which a cable passes and which is communicated with the hollow cavity is formed in one end of the shell; and a step clamped by a test machine is arranged on the outer wall of the shell. The clamping force is large; slipping of the cable is avoided; and the tensile test cable clamp is convenient to use and simple to dismantle, and can be repeatedly used.