The invention relates to an anti-splashing structure of a grinding machine. The anti-splashing structure comprises a protective cover; a coaming is arranged on the lower part of the protective cover; a fixed cover and a baffle plate are mounted on the upper part of the coaming; the fixed cover is equipped with a positioning bolt; the inner part of the fixed cover is connected with a movable cover; the movable cover is equipped with a guide slot and a handle; the protective cover is connected with a telescopic pole; the telescopic pole is connected with a supporting rod; the supporting rod is connected with a rotary shaft; the rotary shaft is equipped with a gear; the rotary shaft is connected with a rack box; a rack is mounted inside the rack box; the rack is connected with a slide rod; a spring and a roller are mounted on the lower part of the slide rod; and the roller is in rolling connection to an inclined block. The anti-splashing structure has the advantages of being reasonable in design, simple in structure, convenient to operate, high in protective performance, time-saving and labor-saving, stable in work, safe and reliable, long in service life, capable of effectively preventing metal chips and sand cutting from splashing to eyes of a worker, protecting safety of the worker and improving production efficiency, and wide in scope of application.