The invention discloses a multifunctional wastewater treatment apparatus. The structure of the apparatus comprises stand support columns, fixed support rods, a pipeline hole, a model mark, a tube bank, an adjustable effluent weir, a wastewater treatment device, an inclined plate assembly and a sludge evacuation mechanism, the quantity of the stand support columns is four, the stand support columnsare uniformly mounted at the lower end of the wastewater treatment device and are welded together, the quantity of the fixed support rods is four, the fixed support rods are horizontally embedded inthe left ends and the right ends of the stand support columns and are welded together, the stand support columns and the fixed support rods are an integrated structure, the pipeline hole is perpendicularly fixed at the upper ends of the fixed support rods and is in interference fit with the wastewater treatment device, the cross section of the model mark has a rectangular structure, the model markhorizontally clings to the front end of the wastewater treatment device, and the model mark and the wastewater treatment device are welded together. The wastewater treatment apparatus has the advantages of improvement of the sludge removal reliability, easiness in sludge removal, enhancement of the mud and water separation effect, increase of the water treatment efficiency, reduction of the laborintensity of residue cleaning, easiness in operation, and easiness in maintenance.