Ecological breeding net cage for cocultivation of sea cucumbers and sea urchins

The invention provides an ecological breeding net cage for cocultivation of sea cucumbers and sea urchins and relates to a mariculture net cage technology. The net cage consists of a net cage frame and a net, wherein the net cage frame comprises a buoyance riser, an upper transverse connecting pipe, a lower transverse connecting pipe, a second lower transverse connecting pipe, a bottom anchor, an air pipe and a net cage self-balancing lifting up-and-down mechanism; the net comprises a top net, a bottom net and a side net; sea cucumber growing attachment bases are arranged on the bottom net; a middle supporting net is arranged in the net cage; sea urchin growing attachment bases are arranged on the middle supporting net; each sea urchin growing attachment base is a plate which is rectangular according to overhead view; through holes are formed on the plate; and an inclined flow baffle vertical plate is arranged at one end of the plate. The ecological breeding net cage for cocultivation of the sea cucumbers and