The invention relates to the technical field of environmental protection and discloses an environment-friendly multi-stage wastewater treatment device. The wastewater treatment device comprises a base, wherein two supporting columns are fixedly arranged on the top of the base; a bottom plate positioned on one opposite side of the two supporting columns is fixedly arranged on the top of the base; afixing rack positioned on the left side of the left supporting column is fixedly arranged on the top of the base; a liquid tank is fixedly arranged on the top of the fixing rack; a liquid spray pipeis fixedly arranged on the right side of the left supporting column; and guide rails are fixedly arranged on one opposite side of the two supporting columns. According to the environment-friendly multi-stage wastewater treatment device, due to matched use of a bracket, a centrifugal net, a centrifugal shaft, a top plate, a motor, a water delivery pipe, a water inlet pipe, a water outlet, a condenser pipe and a valve, when sewage is injected into the centrifugal net by utilizing a centrifugal principle, the motor is started to enable the centrifugal shaft to rotate, so that dirt is rapidly separated from the sewage, the efficiency can be effectively improved, and some larger impurities can be effectively removed.