The utility model discloses an equipment for bridge spanning sea owner mound basis is unmanned to be detected, include: elevating gear, liftable testing platform, steel wire rope and weight box, elevating gear is fixed to be set up on the pontic to be connected with the pontic through the insurance rope, the steel wire rope is total 3, the weight box and wherein 2 steel wire ropes link to each other, the weight box is put through preventing the nail fixing of surge anchor to the seabed after, these 2 steel wire ropes are connected between elevating gear and weight box, these 2 steel wire ropes pass the lift track that hole shape on the liftable testing platform becomes liftable testing platform, another steel wire rope in these 3 steel wire ropes links to each other with liftable testing platform's intermediate position, under elevating gear's drive, drives liftable testing platform and rises or descend along the track that these 2 steel wire ropes formed