Breeding and releasing fry preservation device

The device comprises a box body, a plurality of vertical plates are arranged in the box body, the box body is evenly divided into a plurality of fish storage cavities by the vertical plates, cover bodies are arranged at the opening ends of the fish storage cavities, a plurality of partition plates are arranged in the fish storage cavities, the partition plates are installed in the fish storage cavities, through grooves which are staggered up and down are formed between every two adjacent partition plates, and through holes are formed in the through grooves. A discharging opening is formed in the front side of each fish storage cavity and communicated with a flexible sleeve, a fixing assembly is arranged on the box body, a drainage pipe is arranged at the bottom of the box body and communicated between every two adjacent partition plates, the drainage pipe is communicated with a water pump, the water pump is communicated with a filtering assembly, the filtering assembly is communicated with a water inlet pipe,