The utility model relates to a bridge hoist cable monitor sensor, including the sensor fixed establishment that is fixed in hoist cable top arch rib and the non -contact displacement meter fixed establishment that is fixed in the hoist cable downside, non -contact displacement meter that non -contact displacement meter fixed establishment fixed makes progress the zero friction and inserts in the sensing body component that sensor fixed establishment fixed. The utility model discloses a distance between real -time supervision hoist cable both ends anchor point reachs different data signal, and then judgees the safe state of hoist cable, need not to carry out direct contact with the hoist cable, avoids causing the secondary to damage to the hoist cable, can detect the evaluation to whole root hoist cable, whole section, whole disease, the testing result is stable, and it is less disturbed by external factors, has improved bridge cable force measurement's stability and reliability, simple to operate, cost are not high, are fit for promoting on a large scale.