The invention discloses a lower chord type bridge cable rod connecting device, which comprises a stay rope, a plurality of embedded connectors, a plurality of steel sleeves, a plurality of pressure rods and a plurality of clips, wherein the stay rope is arranged along the length direction of a main beam, and two ends of the stay rope are connected with the bottom of the main beam in arc shape; the plurality of embedded connectors are correspondingly arranged on two sides of the bottom width direction of the main beam, the upper parts of the embedded connectors are embedded into the main beam,and the lower parts of the embedded connectors are exposed; the plurality of steel sleeves are sleeved on the stay rope; the outer surface of each steel sleeve is provided with two connecting parts; the connecting member at the top of each pressure rod is connected with one embedded connector, and corresponding bottom connectors of two pressure rods are connected with two connecting parts of one steel sleeve respectively to form a plurality of rows of V-shaped pressure rod connecting structures; and the plurality of clips are arranged at the front ends or the rear ends of the steel sleeves, are fixedly connected with the stay rope and inhibit the slippage of the stay rope in the steel sleeves.