The invention relates to the detection technology field of an electrical meter and particularly relates to a portable load device. The portable load device comprises a load, a lead accommodation unit, a power unit and a radiation unit, wherein the lead is used for connecting with the electrical meter, the lead accommodation unit is used for accommodating the lead, the power unit is connected with the lead and is used for providing a load with a preset resistance value, and the radiation unit is used for exhausting heat generated by the power unit after being electrified. The portable load device is suitable for providing a load current for onsite correction of the electrical meter, the lead is accommodated through the lead accommodation unit, the lead with reasonable length is provided for use, the portable load device is made to be in a small volume, carrying and storage are convenient, moreover, the radiation unit is further provided for exhausting heat generated by the power unit after being electrified, and thereby detection efficiency of the electrical meter is effectively improved.