A flushing and flow guiding device for an electric nose hair cutter includes a spiral guiding plate located at an outer periphery of an inner blade seat. The spiral guiding plate has an outer radius, smaller than an inner radius of an outer blade seat. By a rotation of the inner blade seat, the spiral guiding plate can drive detergent filled in an inner barrel inside the outer blade seat. By rotating the spiral guiding plate clockwise or counterclockwise, the detergent can be sucked in from a front end of the outer blade seat of the nose hair cutter and then expelled through a periphery at a lower end of the outer blade seat, or can be sucked in from the periphery at the lower end of the outer blade seat, and then expelled through the front end, in order to flush nose hair debris in the blade seat.