HC-2 high efficient deoxidizing catalyst belongs to Pd-Al2O3 series. It is mainly applied to deoxidize from H2 as well as deoxidize from other gases through adding H2. The main theory is: under the function of catalyst, the impurity-O2 in the gas will catalytically react with H2, finally generates H2O. Its remarkable features are high activity, no pulverization, good pressure resistance and so on.