Biological engineering reaction device

The invention discloses a biological engineering reaction device which comprises a reaction tank body and a discharge hole, wherein the discharge hole is formed in the bottom of the reaction tank body; a straight cylinder which extends upwards is arranged at the top of the reaction tank body; a cleaning water tube is arranged inside the straight cylinder; a water ejection ball positioned inside the reaction tank body is arranged at the tail end of the bottom of the cleaning water tube; a fixing plate is arranged on one side of the straight cylinder; a lifting driving device which points upwards is arranged on the fixing plate; and a lifting plate which is connected with the cleaning water tube is arranged at an end part of the lifting driving device. By adopting the mode, the interior of the reaction tank body of the biological engineering reaction device disclosed by the invention is cleaned with water ejected from the water ejection ball, and then residues on a wall surface can be thoroughly cleaned, so tha