The utility model discloses a windshield wiper mechanism of an intelligent patrol robot in a transformer substation. The windshield wiper mechanism comprises a base; a steering engine is fixed on the base, and passes through a bearing on the base through a transmission shaft to be fixedly connected with a swing arm; the upper end of the swing arm is hinged with a wiper bar mechanism; one end of the steering engine is fixedly mounted on the base through a socket head cap screw I; an outer end of an output shaft of the steering engine is connected onto a flange; a coupling is fixed on the flange through a socket head cap screw II; one end of the transmission shaft is fixed on the coupling through a set screw. The mechanism is simple in structure and convenient in control, and can effectively clean dust, raindrops and water films, which are adhered to an optical germanium wafer for a thermal infrared imager and a visible light camera glass sheet.