The invention discloses a water circulation system for aquatic product experiment cultivation, which comprises an experiment barrel, a first connecting pipe, a water storage device, a second connecting pipe and a water pump; the experiment barrel is connected with the water storage device through the first connecting pipe, and the water pump conveys water in the water storage device to the experiment barrel through a second connecting pipe; a filter device is arranged in the water storage device, and the filter device comprises a gravel filter layer, a coral sand filter layer and a quartz sandfilter layer. Through the filter device in the water storage device, water conveyed from the experiment barrel to the water storage device is filtered; finally, the filtered water in the water storage device is conveyed to the experiment barrel by means of a water pump, thus the water filtering and circulating functions in the experiment barrel are realized, excellent water quality and stable water body in the experiment barrel are guaranteed. The water circulation system can filter and circularly use the water for aquaculture.