Abstract: The hyperbolic function method has been used to study new exact travelling wave solutions for a class of nonlinear evolution equation. The basic idea of this method is based on the fact that solitary wave solution of the nonlinear evolution equations is essentially of a localized property.Because the travelling wave solution can assum the polynomial form of the hyperbolic functions, the resultant solutions are obtained by solving a systems of nonlinear algebraic equations.

Key words: hyperbolic function method, nonlinear evolution equation, exact travelling wave solution