The invention relates to a 
sewage treatment device based on electrolytic flotation. The 
sewage treatment device based on electrolytic flotation comprises an 
electrolysis tank, a water inlet 
pipe, a drainage 
pipe, a roof, a rotating mechanism, a stirring mechanism, an 
electrolysis mechanism and two supporting columns, wherein the 
electrolysis mechanism comprises a sliding plate, a driving 
assembly,a negative plate, two cleaning assemblies and two positive plates, the cleaning assemblies comprise lifting plates, telescopic units, lifting plates, connecting frames and cleaning units, and the stirring mechanism comprises a rotating shaft, slides, two sliding blocks, two bearings, two rotating units and two stirring units. According to the 
sewage treatment device based on electrolytic flotation, through the stirring mechanism, sewage flows on the bottom of the interior of the electrolysis tank are stirred, convenience is brought for 
suspended particles on the bottom to be in contact with 
hydrogen bubbles to make electrolysis more fuller, moreover, when the electrolysis mechanism generates the 
hydrogen bubbles, through the telescopic units, the driving 
assembly drives the lifting platesto move vertically to make the cleaning units clean the surface of the negative plate and to enable the negative plate to be in full contact with sewage, the electrolysis efficiency is ensured, and the practicability of equipment is improved.