The invention provides an electromagnetic pulse laminar flow sewage purification device which comprises an aqueduct, a short pipe, a water inlet, a magnetic shielding device, a hollow water cooling helical pipe, a spray passing board, a rough magnetic conductive stainless steel capillary matrix, a water outlet, a sludge collecting hopper, a sludge pipe, a water collection porous pipe, an effluent trough, an inclined pipe and a magnet. The inclined pipe is arranged at the middle position of a laminar flow sedimentation tank; the magnet is fixedly mounted on the inner wall of the sludge collecting hopper; the aqueduct and the short pipe are of an integrated structure; the aqueduct is made of non-magnetic-conductive metal or nonmetal; the rough magnetic conductive stainless steel capillary matrix has a fill rate of 3 to 4%; the section of the inclined pipe is of a honeycomb structure; a transition section of the inclined pipe has a length of 100 to 200mm. The invention has the beneficial effects that the electromagnetic pulse laminar flow sewage purification device is simple in structure, low in manufacturing cost, low in energy consumption, simple in equipment manufacturing, difficult to damage, high in sewage purification efficiency and suitable for popularization and use.