The invention discloses a dining table fixing device for an ocean passenger ship. The device comprises a circular base, a mounting mechanism is arranged below the base, a pushing mechanism is arrangedat the position, corresponding to the mounting mechanism, of the base, and two fixing mechanisms are symmetrically arranged on the base. A rotating mechanism is arranged on each of the two fixing mechanisms. When the device is in use, two threaded rods are aligned with groove openings of the two threaded grooves, the threaded rods are rotated through the rotating mechanism to enable the base to slowly descend into a mounting groove, and when the base descends to the bottom of the mounting groove, the first fixing rod bounces into the second fixing groove under the action of the elastic pieceto fix the base. Meanwhile, the threaded rods are in threaded connection with the threaded grooves, so that the stability of the base is guaranteed, the rotating mechanism can be pulled out and covered with the orifice cover, the dining table is fixed, and the stability of the dining table is kept while the dining table is fixed.