Abstract: The four methods are used to simulate the plate heat exchanger in Units 1 and 2 in Fuqing Nuclear Power Plant, i.e., the criterion number heat exchange formula, HTRI heat transfer factor empirical formula, Matin heat transfer factor empirical formula and A. Muley heat transfer factor empirical formula. The minimum difference of heat exchange area from the design value is calculated by using the criterion number heat exchange formula. This method is used to validated the plate heat exchanger of the component cooling water system in HPR1000 nuclear power plant,and the result shows that the heat exchanger supplied by the factory comply with the engineering requirement.