The utility model relates to an octopus catching net cage which is provided with an upper surface and a lower surface, and the surrounding of the net cage is spliced by netting sheets and takes a cylinder shape, at least one outer cage approach communicated with the outside is opened on the circumferential netting wall of the net cage; the outer cage approach is butted with a big end port of a shrinking through pipe in the net cage, a small end port of the through pipe is arranged in the net cage for forming an inner cage approach. The structure of the cage is reasonable, novel and practical; the anti-current and anti-pitch performances are good, and the bait coefficient is low; the trapping yield is high; the cage is used for trapping the octopus to enter into the cage and be caught by utilizing fresh aquatic baits when using a sinking cage to catch the octopus in nature sea areas, and the yield is high; the cage is suitable for catching the octopus in coastal fishing areas where cephalopoda fishes are richer.