The invention belongs to the technical field of high-voltage electrical tests, and particularly relates to a portable 10kV isolating switch alternating current withstand voltage test device based on awireless control technology. A battery module is connected with an SPWM modulation variable-frequency power module through a cable, and the SPWM modulation variable-frequency power module is connected with an exciting transformer module through a cable; one end of the exciting transformer module is grounded, and the other end of the exciting transformer module is serially connected with the inputend of a reactor module; the output end of the reactor module is simultaneously connected with the input end of the high-voltage arm of a capacitive voltage divider module and the input end of a tested isolating switch; and the grounding end of the voltage divider module is grounded, and the grounding end of the tested isolating switch is grounded. The low-voltage arm of the voltage divider module feeds back a signal to the variable-frequency power supply module; an outgoing cable capacitor is the ground capacitor of the cable; the SPWM modulation variable-frequency power supply module is connected with a handheld wireless controller in a wireless communication mode; all the modules are independent of one another and are integrated in a test box. The problem that power is difficult to supply in an alternating-current withstand voltage test site is effectively solved.