Practical waste water treatment energy-saving equipment and waste water treatment method

The invention provides practical waste water treatment energy-saving equipment which comprises a front-end pretreatment region, a reaction region, a sediment region and a filtering and sterilization region which are sequentially connected in series. The front-end pretreatment region is higher than the reaction region and comprises a grating pool and an adjusting pool which are connected side by side. The reaction region comprises a pool A and a pool O, and the pool A and the pool O are both connected with the sediment region. The pool A is connected with the adjusting pool and internally provided with stirring devices, and the pool O is internally provided with suspended filler and an aerating device. The waste process method through the equipment includes the steps of grating impurity removal, pre-sediment impurity removal, anoaerobic-anoxic-aerobic biochemistry treatment, secondary sediment, filtration, sterilization and the like. By the adoption of the technical scheme, water loss of part of waste water pipes is compensated through terrain and waste water, the aerating device can generate rotational flow of different rotational directions, the aerating effect is good, renewable energy is adopted for the stirring devices, power is saved, all the regions are arranged in a compact mode, the equipment size is small, and the consumption of pipes is saved.