Abstract: The palladium cluster encaged in Y-type zeolite has been synthesized by the method of microwave radiation ion exchange-hydrogen reduction with [Pd (NH₃)₄](NO₃)₂.H₂Oas precursor of ion exchange.The results of XRDand XPSshow that calcination tem-perature has an important influence on the Pd atoms encaging into zeolite NaYand the for-mation of Pd clusters.When the Pd content in zeolite Yis 6.13%, Pd can be also encaged in zeolite Yand form cluster under the condition of preparation at 240 Cof calcination temper-ature and 210 Cof reduction temperature.Using the sample of Pd content 0.410% obtained under the same conditions, the conversion on COcomplete oxidation is 100% at room tem-perature and at 2000 h^-1 (space velocity).Therefor, Pd cluster encaged Y-type zeolite is an excellent catalyst for complete oxidation of carbon monoxide.

Key words: Pd cluster, Y-type zeolite, CO complete oxidation catalyst