Cable tension testing device

The utility model discloses a cable tension testing device which comprises a bottom plate, a step-shaped mounting hole is formed in the upper end face of the bottom plate in a penetrating mode, a mounting block matched with the mounting hole is movably connected into the mounting hole, and an S-shaped tension and pressure sensor is arranged over the mounting block. The upper end face and the lower end face of the S-shaped tension and pressure sensor are fixedly connected with connecting shafts, the connecting shaft located on the lower portion is fixedly connected with an installation block, the other end of the connecting shaft located on the upper portion is fixedly connected with a bearing plate, and if cable tension needs to be tested, the double-acting air cylinder drives the clamping mechanism on the upper portion to move upwards so as to stretch a cable; if the cable pressure needs to be tested, the double-acting cylinder drives the extrusion plate above to move downwards so as to extrude the cable; if