Method and device for compensating chromatic dispersion

The invention discloses a method for compensating chromatic dispersion. The method comprises the steps of receiving burst data from an optical network unit, wherein the burst data comprises a lead code and information data; determining a weighting group for carrying out balance calculation on the information data according to the lead code in the burst data; carrying out balance calculation on the information data by using the weighing group; and obtaining chromatic dispersion compensation output according to the balance calculation result. The embodiment of the invention also provides a device for compensating the chromatic dispersion. The implementation cost can be reduced according to the method and the device.