Dirt resistant component installed at lower external corner of house wall

The utility model discloses a dirt resistant component installed at a lower external corner of a house wall. The dirt resistant component is installed at the lower external corner of the house wall and provided with a water guide strip used for guiding rainwater, a positioning strip used for assisting in positioning installation of the water guide strip and a water outlet strip; one end of the water guide strip is a water collecting part embedded in the vertical wall, and the other end of the water guide strip is a water drainage part used for draining the rainwater; one end of the positioning strip is connected between the water collecting part and the water drainage part, the water outlet strip is arranged at one end of the water guide strip, and an included angle formed between the water guide strip and the positioning strip is larger than or equal to 93 degrees; a plurality of through holes for conducting fixation in cooperation with the vertical wall are distributed in the water collecting part in an array mode; the water guide strip and the positioning strip are integrally molded. The dirt resistant component has the advantages that the polluted rainwater can be guided to be drained, water stains on the wall can be avoided, the structure is attractive, the construction cost is low, and convenience is brought to construction.