Portable contactor detector

The invention relates to a portable contactor detector, which can effectively solve the problems of measuring the performance of a contactor on a vehicle and ensuring the driving safety, and structurally comprises a case, a detection circuit and a detection accessory, the detection circuit is arranged in the case, a display screen is arranged on a front panel of the case, a power supply transmission jack is arranged on a panel on one side of the display screen, and the power supply transmission jack is connected with the detection accessory. A charging power supply jack, a reset button, a power supply switch, a state indicating lamp, a main detection seat, a pull-in detection seat, an auxiliary detection seat and a display screen switch are sequentially arranged on the panel on the other side from top to bottom, and the detection circuit is composed of a single chip microcomputer, a display screen, a power supply, a constant current source, an AD converter, a data shaper and an RS serial port. The device is s