The utility model discloses a four methyl ammonium hydroxide's effluent treatment plant, including the tank, the tank passes through the raceway and is connected with the water inlet of neutralizationreaction cauldron, be equipped with water pump on the pipeline of raceway, the cauldron body internally mounted of neutralization reaction cauldron has the stirring subassembly, the stirring subassembly includes the (mixing) shaft, top -down installs a plurality of stirring cross rod and stirring turbulence rod in proper order on the axis body of (mixing) shaft, install the vortex tooth on stirring turbulence rod's the body of rod, the baffling board is installed to the internal portion both sides of cauldron of neutralization reaction cauldron, the lower extreme of neutralization reaction cauldron sets up the delivery port, the delivery port is through last water piping connection filtering component. Internally mounted through at the neutralization reaction cauldron body stirs the subassembly, has realized the effect of neutralization reaction's abundant reaction, is equipped with the baffling board in the both sides of the reation kettle body, guarantees can not cause damage and unstable problem to the reation kettle body owing to the impact of water at waste water when getting into the reation kettle body.