Chronic toxicology test device for zebra fish

The utility model discloses a zebra fish chronic toxicology test device, which comprises a test assembly, a dosing assembly and a backflow assembly, and is characterized in that the test assembly comprises a fish tank capable of accommodating zebra fish; the medicine adding assembly comprises a medicine box capable of containing test liquid medicine, and the medicine box is communicated with the fish tank through a conveying pump and a medicine adding pipeline; the backflow assembly comprises a waste liquid box, and the fish tank is communicated with the waste liquid box through a backflow pipeline. The dosing assembly extracts test liquid medicine in a medicine box through a conveying pump, the conveying pump can input the extracted test liquid medicine into the fish tank, on the premise that stable dosing is guaranteed, the test operation convenience is improved, the test accuracy is improved, and meanwhile the problem that in the prior art, time and labor are wasted due to the fact that reagents need to be