The invention relates to a purification device, in particular to a sewage purification treatment device which comprises an integral bracket, a support mechanism, a power mechanism, an adjustment mechanism and a treatment mechanism. The sewage purification treatment device has the advantages that waste in wastewater can be stripped by the treatment mechanism, high torque is required for treating the wastewater when the waste in the wastewater is high in content, the wastewater has tendency for pushing the treatment mechanism to downwardly move, the support mechanism can downwardly move when thetreatment mechanism downwardly moves, compression springs I and compression springs II can be squeezed by the support mechanism to drive a conical friction wheel II to carry out friction movement ona conical friction wheel I, the relative location of the conical friction wheel II on the conical friction wheel I is changed, the transmission diameter of the conical friction wheel I is changed, andis decreased along with increase of the content of the waste in the waste water, the torque is increased along with decrease of the rotational speed of the conical friction wheel II, and is increasedwhen a treatment spiral shaft rotates, and accordingly the sewage purification treatment device is applicable to the condition of high content of waste in wastewater.