The utility model relates to a portable air switch detector. A functional adjusting circuit, a timer, a switching circuit and an operation display circuit which are mutually connected are arranged in a box; the functional adjusting circuit comprises an AC-DC dual-use adjustable boost switch circuit and an adjustable large power current power supply; and a control circuit is provided in the operation display circuit, and a program recording the instantaneous voltage value generated by an electronic switching circuit, the instantaneous current value generated by a large power adjustable power supply and the motion time of the air switch to be detected, and a program displaying the voltage value/current value and the time value of the timer correspondingly to obtain overvoltage breaking information, overcurrent breaking information and motion time of the air switch are stored in the control circuit. The characteristics of the air switch to be detected are accurately obtained and compared to set standards to determine the reliability of the air switch to be detected. The air switch detector is compact and light, and household electricity safety is guaranteed.