The invention relates to the technical field of a resistor, and more specifically relates to a cooled large-power wire-wound resistor. A structure of the cooled large-power wire-wound resistor comprises a first end plate, a second end plate, and at least two insulating tubes used for coiling. the first ends of the insulating tubes are arranged on the first end plate, the second ends of the insulating tubes are arranged on the second end plate, cooling fluid flows through the insulating tubes, the insulating tubes are communicated to form a fluid passage, the communication structure of each insulating tube is characterized in that two insulating tubes are communicated at the first ends and are not communicated at the second end plate, the resistor has large power, and has the advantages of small volume and good heat radiation effect.