A vehicle carpet and mat fixing device may include an upper mat fastener part; a lower mat fastener part coupled to the upper mat fastener part; an upper carpet fastener part coupled to the lower mat fastener part by an upper carpet fastener protrusion protruding toward the lower mat fastener part; and a lower carpet fastener part coupled to the upper carpet fastener part, wherein the upper mat fastener part is hooked to the lower mat fastener part by an upper mat fastener hook circumferentially formed in the upper mat fastener part to fix a mat, and the lower carpet fastener part is coupled to the upper carpet fastener part by a male hook of the lower carpet fastener part to fix a carpet.