A flat fluorescent lamp (FFL) is provided. Strip electrodes of the FFL include a plurality of electrode branches, and a plurality of dielectric branches is arranged around the electrode branches, so as to increase the coating area of the fluorescent material. The distribution position of the fluorescent material may be adjusted by the dielectric branches, thus enhancing the brightness of the FFL and improving the uniformity of the output light. The present invention further provides a liquid crystal display which utilizes the FFL as a backlight source for achieving a better display effect.