The invention discloses a container positioning guide rail device for ships. The container positioning guide rail device comprises four guide rail racks in long strip shapes, wherein 2-4 corbel supports are arranged on each guide rail rack; the corbel supports on different guide rail racks are arranged on the same horizontal plane; each corbel support comprises a pivot shaft which is parallel to the guide rail rack, and a supporting body arranged on one side of the pivot shaft; an upper pivot base connected with the pivot shaft, and a lower pivot base connected with the pivot shaft are connected with each guide rail rack; a lower oil cylinder of which the axis is parallel to the guide rail rack is arranged in each supporting body; the upper end of a lower oil cylinder piston is connected with a supporting block; an upper oil cylinder of which the axis is perpendicular to the surface of a cabin wall is arranged on the cabin wall above each corbel support; the outer end part of an upper oil cylinder piston is connected with a top block; a tension spring is arranged between each top block and the upper oil cylinder; the bottom of each lower oil cylinder is communicated with the corresponding upper oil cylinder through a hydraulic pipeline; the corbel supports on different guide rail racks and at the same height take synchronous action. The container positioning guide rail device effectively solves the problems that containers in the prior art are easy to shift, so that the positioning effects of the containers are influenced, or guide rails on cabin walls are damaged; therefore, the container positioning guide rail device has a high practical value.