The invention discloses a magnetic flocculation sewage treatment magnetic powder recycling device. According to the magnetic flocculation sewage treatment magnetic powder recycling device, by means ofthe magnetism of magnetic powder, the magnetic intensity of an electromagnet and a secondary recycling magnetic mesh is set to be adjustable and accordingly can be increased effectively as required to improve the magnetic powder recycling rate; meanwhile, by means of a primary magnetic powder recycling module and a secondary magnetic powder recycling module, two-stage recycling can be more thorough; the primary magnetic powder recycling module can be large in recycled capacity and be rapidly flushed in a back flushing mode to achieve high flushing efficiency and thorough magnetic powder recovery; meanwhile, the secondary recycling magnetic mesh is rotatably arranged to uniformly recycle magnetic powder in sewage to ensure higher recycling reliability.