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Perturbation methods depend on small parameters which are difficult to find for real-life nonlinear problems. He's parametrized perturbation method, which does not need small parameters, is one of the newest analytical methods to solve nonlinear equations. In this letter some nonlinear heat transfer equations are used as examples to illustrate the simple solution procedures of this method. Comparison of the results obtained by the new method with exact solutions reveals that the method is tremendously effective.