The invention provides a realization method of frequency optimization and an apparatus thereof. The method comprises the following steps: (A) setting a whole network cell in a present network, and dividing a road guarantee cell in the whole network cell; (B) according to a set cell frequency point restriction condition, deploying a frequency point for each cell in the present network, and dividing frequency points of all cells into N groups, wherein N is a positive integer larger than 1; (C) establishing a whole network interference matrix for the whole network cell, and establishing a road interference matrix for a road guarantee cell; (D) by utilizing a multi-target heredity algorithm and every interference matrix established in the step (C), calculating an adaptation degree corresponding to each group, selecting an adaptation degree satisfying a set object from calculated adaptation degrees, and determining a frequency point of each cell in a group corresponding to the selected adaptation degree as an optimal frequency point of each cell. By employing the method and the apparatus in the invention, purposes of ensuring whole network performance and optimizing partial performance simultaneously can be realized.