The present invention discloses a method and an apparatus to automatically remove crosstalk, which can automatically determine and set the start frequency in the G.fast system without unnecessary manual operation to automatically remove crosstalk interference between VDSL and G.fast. The present invention allows the time required to complete the setting of the start frequency in the G.fast system corresponding to each port of a unit of DPU/DSLAM equipment and the related work therefor to be reduced to less than 2 minutes. Therefore, the installation time is greatly reduced, human errors are also reduced, and the installation can be done correctly by ordinary technicians, which is advantageous to the promotion of G.fast systems.