Through the aeration experiment on variable turbulence flow, the aeration performance of HCR reactor was researched.The influence of the inner diameter, jet flow and temperature of self—made reactor to the performance were investigated.We got the sequence of the factors affecting the Oxygen—transfer efficiency as follow jet flow—}inner diameter of the reactor—}temperature.Mean—while we confirmed the optimum jet flow of the rector was 2.5 m³/h, optimum inner diameter was 7 cm, which provided reliable technical parameters to the following experiments