The utility model discloses a splash-proof slurry returning groove. The splash-proof slurry returning groove comprises a bottom plate and side wallboards which are fixed at two sides of the bottom plate, wherein the side wallboards are provided with a splash-proof structure which is partially heightened. By adopting the splash-proof structure which is partially heightened on the side wallboards, the splash-proof slurry returning groove prevents slurry on the corresponding parts from splashing out, thereby being capable of reducing anti-explosion demand for peripheral equipment and saving equipment cost.