The invention relates to a noble metal catalyst with high thermal stability. The noble metal catalyst comprises a noble metal, sol particles, a lanthanum-doped aluminum oxide and a cerium zirconium oxide, wherein the noble metal accounts for 0.5-5% of the total mass of the catalyst; the sol particles account for 1-10% of the total mass of the catalyst; the lanthanum-doped aluminum oxide and the cerium zirconium oxide account for 85-98.5% of the total mass of the catalyst; the mass ratio of the lanthanum-doped aluminum oxide to the cerium zirconium oxide is (1-1.5):1. By adopting the noble metal catalyst with the high thermal stability, migration and aggregation of the noble metal on the surface of a carrier can be inhibited under a high-temperature condition, the utilization rate of the noble metal in an aged catalyst is increased, then the combustion temperatures of harmful gases such as CO, HC and NOx can be reduced, the conversion efficiency of the harmful gases can be improved, emission of harmful gases in automobile tail gases can be further reduced, and the national phase VI light automobile emission standards can be met.