Fabricated building construction device with good reinforcing property

The invention discloses a good-reinforcement fabricated building construction device which comprises a fixed base, a mounting groove is formed in the top end of the fixed base, a clamping device is mounted in the mounting groove and comprises a pair of fixed bottom plates, the fixed bottom plates are slidably mounted in the mounting groove, and clamping plates are vertically and fixedly mounted at the top ends of the fixed bottom plates. Racks are fixedly mounted on the bottom sides of the pair of fixed bottom plates, an assembling groove is formed in the position, close to the center of the mounting groove, of the fixed base, a pressure bearing device is mounted in the assembling groove and comprises a supporting plate, connecting pins are arranged on the left side and the right side of the supporting plate, and connecting rod mechanisms are connected to the connecting pins through shafts; the other end of each connecting rod mechanism is connected with a sector gear, and the sector gears are meshed with the