Abstract: To standardize the SCR denitration catalyst testing and performance evaluation in thermal power plants, by taking the example of the newly-built experimental platform, which is constructed on the basis of the requirements of related standards, this paper analyzes the background of this platform, and puts forward the basis of design and principles followed. Then it presents the technical procedures, platform functionalities, experiment design and, corresponding equipments. Finally the focus and difficulties during the construction process as well as the matters needing attentions are summarized.