The invention discloses a kitchen oil-water separator. The kitchen oil-water separator is characterized by comprising a pool body, wherein the front side wall of the interior of the pool body is provided with an oil-isolating plate I and an oil-isolating plate II; the right sides of the oil-isolating plate I and the oil-isolating plate II are respectively provided with a mud-isolating plate I anda mud-isolating plate II; a filter sieve is arranged between the mud-isolating plate I and the left side wall of the pool body; the upper part of the filter sieve is provided with a sewage inlet whichpenetrates through the pool body; a primary separation chamber is arranged between the lower part of the filter sieve and the mud-isolating plate I; a secondary separation chamber is arranged betweenthe mud-isolating plate I and the mud-isolating plate II; a tertiary separation chamber is arranged between the mud-isolating plate II and the right side wall of the pool body; and the right side wall of the pool body is also provided with an anti-odor water outlet.