The invention relates to an anti-condensation device for an urban distribution network cabinet, and a working method thereof, belonging to the technical field of power distribution equipment. The anti-condensation device for the urban distribution network cabinet comprises a device body; at least one condensation channel is arranged in the device body; a push rod is arranged in the channel; a push head is arranged at one end of the push rod; the other end of the push rod is connected with a motor; a semiconductor refrigeration thermoelectric slice is arranged outside the cavity of the condensation channel; the refrigeration surface of the semiconductor refrigeration thermoelectric slice is connected with the surface of the cavity of the condensation channel; and the semiconductor refrigeration thermoelectric slice is connected with an external power supply. After the semiconductor refrigeration thermoelectric slice is electrified, the temperature of the surface of the cavity of the condensation channel near the refrigeration surface is reduced; according to the principle that wet hot air can be condensed while being cooled, at this time, wet hot air in an environment can form condensed dews on the inner wall of the condensation channel; the motor drives the push rod to drive the push head to collect the condensed dews; wet hot air is condensed into water and discharged out of a cabinet; therefore, the relative environment humidity is reduced; and the interior of an electric cabinet is really kept dry.