The invention discloses a fuel filter capable of high-efficiently exhausting. The fuel filter comprises a shell, a filter element, a diversion tube, a connection plate, an exhausting plug and a spring; a flange assembly surface is arranged on the shell; the flange assembly surface is used for being connected with a filter base; the fuel filter is arranged on a fuel way from a fuel tank to an engine fuel pump through the filter base; the diversion tube is fixed at the center of the filter element; multiple through holes are formed in the periphery of the upper end of the diversion tube; the connection plate is arranged on the top of the filter element; a fuel inlet is formed in the connection plate; fuel can enter the filter element through the fuel inlet; multiple sintering copper holes are formed in the exhausting plug; the exhausting plug is arranged between the connection plate and the filter element, and is used for exhausting air before fuel is filtered; and the spring is arrangedon the bottom of the filter element and is used for fixing the filter element. The fuel filter disclosed by the invention is compact in structure, good in universality and high in reliability; and the exhausting effect of the air in the fuel is obviously improved, so that the problems in the prior art that operation flameout of an engine easily happens, and starting is difficult are solved.