Floor bearing plate supporting device

The utility model relates to the technical field of buildings, in particular to a floor support plate supporting device which comprises a floor support plate and a supporting assembly, the supporting assembly comprises a placing groove, a motor, a first threaded rod, a connecting shaft, a second threaded rod, two moving blocks and a supporting plate, the placing groove is placed below the floor support plate, and the motor is fixedly connected with the placing groove. One end of the first threaded rod and one end of the second threaded rod are fixedly connected with the connecting shaft and symmetrically distributed at the two ends of the connecting shaft, the other end of the first threaded rod penetrates through the placing groove, and the two moving blocks are provided with threaded holes. And a second threaded rod is driven to rotate to be matched with two threaded holes, so that a movable block moves, the supporting position is changed, the lower portion of the floor support plate is supported through a