The invention relates to a shielding suit complete-set device for measuring step voltage and contact voltage. The shielding suit complete-set device comprises a shielding suit; the shielding suit includes a right foot insulating boot part, a left foot insulating boot part and a glove part; an inter-electrode voltage measuring module (2) is fixed on the shielding suit; the inter-electrode voltage measuring module (2) is provided with three signal input ports and a signal output port; and the three signal input ports are a first signal input port, a second signal input port and a third signal input port. The device can be applied to the step voltage and contact voltage signal measurement in power system ground grid comprehensive evaluation and measurement. The device has high integration degree, can accurately measure all step voltage and contact voltage in a grounding power grid region under a grounding power grid comprehensive evaluation test condition or direct current ground loop grounding operation mode.