Catalyst for concurrently and efficiently removing soot and NOx under oxygen-enriched, sulfur-containing and water-containing conditions, and preparation method thereof

The present invention provides a catalyst for concurrently and efficiently removing soot and NOx under oxygen-enriched, sulfur-containing and water-containing conditions, and a preparation method thereof. According to the catalyst, two noble metals are loaded on a certain carrier according to a certain ratio and a certain loading sequence. According to the present invention, with the catalyst, soot and NOx can be concurrently removed under the oxygen-enriched condition, the soot oxidation temperature can be substantially reduced and the high NOx removing rate can be maintained under the oxygen-enriched, sulfur-containing and water-containing condition; and the catalyst has characteristics of high sulfur resistance and high water resistance, and is diesel vehicle tail gas pollutant purification material having the high application value.