Abstract: A numerical method was given to solve the point reactor neutron kinetics equations by using the technique of trigonometric interpolation. It used the format of all implicit guarantee the stability of A. The calculated results show that the method can be applied to a variety of flexible response of the input, and the calculation time is short, the calculation accuracy is high, to meet the actual needs of the project. It is a better method for solving the point reactor neutron kinetics equations.