Metal plate suspended ceiling structure and construction method thereof

The invention discloses a metal plate suspended ceiling structure and a construction method thereof, the metal plate suspended ceiling structure comprises a plurality of top-attached bases, each top-attached base is provided with a first strip-shaped through hole, a first rack is laid on the hole wall of the first side of each first strip-shaped through hole, and an assembly hole is formed in the hole wall of the second side of each first strip-shaped through hole; the upper end of the hanging rod is movably arranged in the first strip-shaped through hole, the upper end of the hanging rod is coaxially connected with a first gear, and one side of the first gear is meshed with the first rack; the locking assembly comprises a locking block and a driving rod, the locking block is arranged in the assembling hole in a sliding mode, a second rack is laid on the side, facing the first rack, of the locking block, a second strip-shaped through hole is formed in the locking block, a communicating hole communicating with