Low Ratio of Consumed Energy and Efficiency of High-consumde-energy Equipment Impirted Blindly from Abroad ZHANG Xin-heng,QIAN Wei-xin (Jiangsu Province Yatai Technical Innovation Centre, Taixing 225400) Abstrct: The article explained the ratio of consumed energy and efficiency of some sewage treatment equipment with realistic examples to prove through calculation of similar imported products and products made in China. Key words:low efficiency; submersible agitator; aeration machine with down umbrella shape; rated power; the actual power consumption