Fish fry hatching device

The invention discloses a fish fry hatching device. The fish fry hatching device is structurally characterized in that a reservoir is connected with a water outlet pipe by a water pump, a water distribution groove is formed in a position below an outlet of the water outlet pipe, an oxygen cylinder is connected with the water distribution groove by an oxygenation pipe, a plurality of water distribution pipes are connected with the lower side of the water distribution groove and are connected with water injection nozzles by valves, hatchers are arranged below the water injection nozzles and comprise V-shaped containers, water collecting rings, flow constraining rings and gates, the water collecting rings are connected with the upper sides of the V-shaped containers, the flow constraining rings are positioned in the water collecting rings, the lower sides of the flow constraining rings are connected with the V-shaped containers, the upper sides of the flow constraining rings are drawn together towards the center