The invention discloses a novel printed circuit board (PCB) browning cleaning method. Air knives are arranged above and below a browning line at the inlet end of a browning device correspondingly, andair outlets of the air knives blow towards the browning line; and relative to the conveying direction of the browning line, the air outlets of the air knives are reversely inclined to blow towards the browning line. According to the novel PCB browning cleaning method, the effect of cleaning the board face of an inner-layer core board of a PCB can be achieved without using any material, the material cost is lowered, economization and environmental protection are achieved, secondary pollution is also prevented, and the yield of the circuit board is increased.