A composite oxide support containing ceria and an oxide of M1(M1 being Al, Zr or Ti) such that the atomic ratio of cerium to M1 is in the range of 1:4 to 1:40; a method of preparing the composite oxide support; a catalyst for low temperature water gas shift reaction, having a transition metal active component supported on the composite oxide support by an incipient wetness method; and a method of preparing the catalyst for low temperature water gas shift reaction are provided. The catalyst for low temperature water gas shift reaction prepared by using the composite oxide support can effectively remove carbon monoxide from the hydrogen produced from the low temperature water gas shift reaction at a lower temperature with a higher carbon monoxide conversion rate, compared with conventional catalysts for water gas shift reaction.