The utility model discloses a diverter which belongs to an auxiliary device of an oil pumping well. The utility model has the technical proposal that the upper part of the interior of a main body is provided with a valve seat and a well washing valve. The upper part of the well washing valve and the main body form a cavity. The lower part of a valve body is connected with a bottom valve of which the interior is provided with a magnet core overflowing device and the seat of the bottom valve. A valve ball is arranged between the magnet core overflowing device and the seat of the bottom valve. The lower part of the main body is provided with a control ring. A spring is arranged between the well washing valve and the control ring. The utility model is matched with an underground packer to improve the production state of an oil well so that the bottom oil of a low-voltage and low-producing oil well is especially favorably aggregated and extracted. The output of production is enhanced, and the situation of the well flushing of a pumping well is improved. An oil layer is prevented from being polluted by well flushing fluid, and the efficiency of flushing the well is enhanced. The period of flushing the well is extended.