The invention relates to a pad-mounted transformer cable magnetic field coupling type charge indicator which comprises an electric power acquisition metal indication plate and an indicator body. The electric power acquisition metal indication plate packages the external surface of a pad-mounted transformer cable insulating layer, thereby forming an electromagnetic induction connection. The electric power acquisition metal induction plate is electrically connected with the signal input end of the indicator body. The indicator body comprises a protective circuit, a charging circuit, a switch circuit and a light emitting component. According to the pad-mounted transformer cable magnetic field coupling type charge indicator, a static electric field which is generated by a high-voltage cable body is used; a metal thin plate packs the outer wall of a semi-conductive rubber sleeve; induced charges are generated on the metal thin plate according to a capacitor induction principle; charges are lead into the circuit for charging a capacitor; and when charges are accumulated to a certain degree and a certain voltage is generated, switch components at two ends of the capacitor are automatically switched on for discharging and lightening the light emitting member in a discharging loop, thereby determining whether the cable is charged, improving safety and reliability in charge inspection operation of the pad-mounted transformer cable, and realizing high practicability and relatively high economic value.