The invention provides an access method for efficient memory model organization of a CIMXML document. The method includes the first step of constructing a memory model of the CIMXML document, wherein all power objects are described according to a unified memory structure, and a memory structure description is established for each power object type; the second step of having access to the memory model. The execution efficiency of the process that attribute values are positioned by attribute names is not related to the number of accessed objects and the number of attributes any longer and is a negligible fixed time, and therefore the access efficiency of batch object data is greatly improved. The problems that according to current CIMXML document memory model organization methods, memory usage is overlarge, and the efficiency of batch access carried out according to types is low are solved.