The utility model relates to diode taping backward voltage detector, in particular to a wearproof lettering manual fast brushing and detecting device. The manual fast brushing and detecting device comprises a brushing plate and a brush; the brushing plate is provided with a groove adaptive to the width of a diode tape, and a gap adaptive to a diode is arranged on the brushing plate in a groove region; and the brush consists of two brush arms and a brush handle, the brush arms are fixed on the brush handle, and the tail ends of the brush arms are respectively connected onto a withstand voltage instrument. By adopting the structure, the device can fast detect the backward withstand voltage of the taped diode, thus improving the detection efficiency and lowering the production cost.