The present invention discloses a measurement method for local surface resistance of a contaminated insulator, belonging to the insulator contamination detection technology field. The measurement method comprises: the step 1: fixing a measured contaminated insulator on a sample frame, and employing a plurality of aluminum tapes with the same size to perform local segmentation of the measured contaminated insulator; the step 2: employing copper wires to connect all the aluminum tapes with a resistance measuring meter, applying voltage to the whole measured contaminated insulator, and employing the resistance measuring meter to measure and obtain resistance values of different wires; and the step 3: employing an area resistance value superposition method to calculate and obtain the surface resistance of the corresponding area of the measured contaminated insulator. The measurement method for local surface resistance of the contaminated insulator can reliably reflect the real pollution condition of the insulator surface and is simple to operate.